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MHC — Monterey Hockey Club Database: Technical Documentation

Audience: Full-stack developers. This document covers the complete system architecture, database design, REST API contract, frontend implementation, security posture, and operational details.


Table of Contents

  1. System Overview
  2. Repository Layout
  3. Infrastructure & Deployment
  4. Database
  5. Backend — API Server
  6. REST API Reference
  7. Frontend — React SPA
  8. Authentication & Authorisation
  9. Security Controls
  10. Data / Privacy Rules
  11. Development Workflow

1. System Overview

MHC is a full-stack web application that manages and displays the historical records of the Monterey Hockey Club. It tracks:

  • Member profiles — both playing members ("BRN" prefix) and non-playing volunteers ("MHC" prefix)
  • A self-referencing recruitment tree (who recruited whom)
  • Grand final appearances and rosters
  • Committee roles held per year
  • Trophy / award winners
  • A static club history timeline (hardcoded in the frontend)
  • Year-by-year overview aggregating all of the above

Public access: All GET endpoints are unauthenticated — the club's historical record is publicly readable.
Admin access: All mutating operations (POST, PUT, DELETE) require a valid JWT issued by the /api/auth/login endpoint.


2. Repository Layout

MHC/
├── docker-compose.yml          # Orchestrates db / server / client containers
├── client/                     # React SPA (Vite)
│   ├── Dockerfile              # Multi-stage: Node build → nginx:alpine serve
│   ├── nginx.conf              # SPA fallback + /api/ reverse-proxy to server:5000
│   ├── vite.config.js          # Dev-mode proxy mirrors nginx
│   └── src/
│       ├── App.jsx             # Router tree
│       ├── components/Layout.jsx  # Shell: header, nav, footer, dark-mode toggle
│       ├── contexts/AuthContext.jsx  # React context wrapping token + user state
│       ├── services/
│       │   ├── api.js          # All fetch wrappers (one export per API call)
│       │   └── tokenStore.js   # localStorage token store with pub/sub
│       └── pages/              # One file per route (see §7)
└── server/                     # Express API
    ├── Dockerfile              # node:20-slim + openssl; runs prisma generate
    ├── src/
    │   ├── index.js            # App bootstrap: helmet, CORS, rate-limits, routes
    │   ├── prismaClient.js     # Singleton PrismaClient export
    │   ├── schemas.js          # All Zod request schemas
    │   ├── middleware/
    │   │   ├── auth.js         # requireAuth — JWT Bearer verification
    │   │   └── validate.js     # Zod validation middleware factory
    │   ├── utils/httpError.js  # HttpError class + asyncHandler wrapper
    │   ├── routes/             # Express routers (one per resource)
    │   └── controllers/        # Business logic (one per resource)
    └── prisma/
        ├── schema.prisma       # Data model + datasource
        ├── seed.js             # Initial data seed entry point
        └── migrations/         # Prisma migration history (3 applied migrations)

3. Infrastructure & Deployment

Docker Compose Stack

Three services, one network (Docker default bridge):

Service Image / Build Internal Port Exposed
db postgres:16 5432 Not exposed to host
server ./server (Node 20) 5000 Not exposed to host
client ./client (nginx:alpine) 80 :80 → host

All inter-service communication is internal. The only host-facing port is 80 (client). The API is never directly reachable from the internet — all traffic goes through the nginx reverse proxy in the client container.

Persistent storage: A named Docker volume mhc_postgres_data backs the PostgreSQL data directory.

Environment Variables

Supplied at runtime via .env (not committed). Required variables:

Variable Consumer Purpose
POSTGRES_USER db, server DB username
POSTGRES_PASSWORD db, server DB password
POSTGRES_DB db, server Database name
DATABASE_URL server Full Prisma connection string (postgresql://user:pass@db:5432/dbname)
JWT_SECRET server HS256 signing secret — must be a strong random string
FRONTEND_ORIGIN server Comma-separated allowed CORS origins (e.g. https://mhc.example.com)
ADMIN_USERNAME server Single admin account username
ADMIN_PASSWORD_HASH server bcrypt hash of admin password (use server/scripts/hashPassword.js to generate)
NODE_ENV server Set to production in the compose file
TOKEN_TTL (optional) server JWT expiry duration (default: 8h)

nginx Reverse Proxy

client/nginx.conf:

server {
    listen 80;
    root /usr/share/nginx/html;
    index index.html;

    location /api/ {
        proxy_pass http://server:5000;   # Forward all /api/* to Express
    }

    location / {
        try_files $uri $uri/ /index.html; # SPA fallback
    }
}
  • All API calls from the browser go to the same origin (port 80), avoiding cross-origin issues in production.
  • VITE_API_URL is not needed in production; api.js defaults to /api (same-origin).

Client Build (Multi-Stage Dockerfile)

FROM node:20-alpine AS build    # Stage 1: Vite build
WORKDIR /app
COPY package.json ./
RUN npm install
COPY . .
RUN npm run build               # Outputs to /app/dist

FROM nginx:alpine               # Stage 2: Serve static files
COPY --from=build /app/dist /usr/share/nginx/html
COPY nginx.conf /etc/nginx/conf.d/default.conf
EXPOSE 80

Server Dockerfile

FROM node:20-slim
RUN apt-get update -y && apt-get install -y openssl  # Required by Prisma
WORKDIR /app
COPY package.json ./
RUN npm install
COPY . .
RUN npx prisma generate        # Generate PrismaClient from schema
RUN npm prune --omit=dev       # Strip devDependencies from final image
EXPOSE 5000
CMD ["node", "src/index.js"]

4. Database

Engine

PostgreSQL 16, managed by Prisma ORM (v5.22).

Schema

Four application models plus one junction table:

Member

The central entity. Primary key is a human-assigned string following a strict convention.

Column Type Notes
id String PK BRN### (players) or MHC### (volunteers). Validated by regex ^(BRN|MHC)\d{3}$
firstName String
lastName String
approximateDob DateTime Always stored as YYYY-01-01T00:00:00.000Z — see §10
yearJoined Int
gamesPlayedTotal Int? Defaults to 0; nullable for volunteers
gamesPlayed1stGrade Int?
gamesPlayed2ndGrade Int?
gamesPlayed3rdGrade Int?
gamesPlayedSummerComp Int?
goalsScored Int?
isRetired Boolean Default false
retirementYear Int?
recruitedById String? FK Self-referencing FK → Member.id

Self-referencing recruitment relation:

Member ─── recruitedBy ──→ Member (0 or 1)
Member ←── recruits ────── Member (0 to many)

GrandFinal

Column Type Notes
id String PK e.g. GF_2023_1st — alphanumeric + underscores/dashes
year Int
grade String e.g. 1st Grade
opponent String
score String e.g. 3-1
result String Win, Loss, or Draw

GrandFinalRoster (junction table)

Column Type Notes
memberId String FK Member.id
grandFinalId String FK GrandFinal.id
isCaptain Boolean Default false
(composite PK) [memberId, grandFinalId] Enforces uniqueness

CommitteeRole

Column Type Notes
id Int PK Auto-increment
memberId String FK Member.id
position String e.g. President, Life Member
year Int

Trophy

Column Type Notes
id Int PK Auto-increment
memberId String FK Member.id
awardName String e.g. Brian Wilson Memorial Trophy
year Int

Migrations (Prisma)

Three applied migrations (timestamps are UTC):

Migration Change
20260430035927_init Initial schema — all five tables
20260430053933_add_retirement_fields Added isRetired, retirementYear to Member
20260430104221_add_iscaptain_to_roster Added isCaptain to GrandFinalRoster

Run migrations with: npx prisma migrate deploy (production) or npx prisma migrate dev (development).

Entity-Relationship Diagram

Member ────────────────── GrandFinalRoster ─── GrandFinal
  │   (0..* each side)
  │
  ├──── CommitteeRole (1 Member → many roles)
  ├──── Trophy        (1 Member → many trophies)
  └──── Member        (self-ref: recruiter → recruits)

5. Backend — API Server

Technology Stack

Package Version Role
express ^4.19 HTTP framework
@prisma/client ^5.22 Database ORM
jsonwebtoken ^9.0 JWT sign / verify
bcryptjs ^3.0 Password hash comparison
helmet ^8.1 Security headers
cors ^2.8 CORS enforcement
express-rate-limit ^8.4 Rate limiting
zod ^4.4 Request schema validation
dotenv ^16.4 Env loading

Application Bootstrap (src/index.js)

Middleware stack applied in order:

  1. app.set('trust proxy', 1) — tells Express to trust one upstream proxy hop (nginx), required so express-rate-limit reads real client IPs from X-Forwarded-For.
  2. helmet() — sets HSTS, X-Content-Type-Options, X-Frame-Options, Referrer-Policy, etc. crossOriginResourcePolicy is set to cross-origin to allow the SPA to consume the API.
  3. CORS — origins parsed from FRONTEND_ORIGIN env var (comma-separated). Non-browser clients (no Origin header) are allowed through. Credentials mode enabled.
  4. express.json({ limit: '50kb' }) — body parser with hard payload cap.
  5. Rate limiters — applied to all /api routes (see §9).
  6. Route handlers — each resource mounted under /api/<resource>.
  7. 404 handler — catches any unmatched /api/* path.
  8. Centralised error handler — 4-argument Express error middleware; maps known error types to HTTP status codes and suppresses stack traces in production.

Error Handling Architecture

HttpError (src/utils/httpError.js):

class HttpError extends Error {
  constructor(status, message) {
    super(message);
    this.status = status;
    this.expose = true; // safe to send to client
  }
}

asyncHandler wraps every async controller so that thrown errors (and rejected promises) flow to the central error middleware rather than crashing the process.

Central error handler classification:

Condition HTTP Status Client Response
err.message.startsWith('CORS:') 403 { error: 'Origin not allowed' }
err.type === 'entity.too.large' 413 { error: 'Payload too large' }
err.type === 'entity.parse.failed' 400 { error: 'Malformed JSON' }
err.expose === true (HttpError) err.status { error: err.message }
Anything else (prod) 500 { error: 'Internal server error' }
Anything else (dev) 500 Full error details

Prisma error codes are caught in controllers and mapped to HttpErrors:

Prisma Code Meaning Mapped HTTP
P2002 Unique constraint violated 409 Conflict
P2003 Foreign key constraint failed 400 Bad Request
P2025 Record not found 404 Not Found

Validation (src/middleware/validate.js)

A middleware factory: validate(schema, part = 'body').

  • Calls schema.parse(req[part]) (Zod strict mode strips unknown fields).
  • On success, replaces req[part] with the parsed/coerced value — this is the mass-assignment defence.
  • On ZodError, returns 400 with an array of { path, message } issues.

All schemas live in src/schemas.js and use .strict() — any unknown key is rejected.


6. REST API Reference

Base path: /api

Health

Method Path Auth Description
GET /health None Returns { status: 'OK', message: '...' }

Auth

Method Path Auth Rate limit Body Response
POST /auth/login None 10 req / 15 min / IP { username, password } { token, username, role }
GET /auth/me Bearer JWT General { username, role }

Members

Method Path Auth Description
GET /members None Paginated, filterable, sortable member list
GET /members/:id None Full member detail with all relations
GET /members/:id/recruitment-tree None Recursive recruitment tree (depth-first)
POST /members Bearer JWT Create member
PUT /members/:id Bearer JWT Update member (partial supported)
DELETE /members/:id Bearer JWT Delete member

GET /members query parameters:

Param Type Default Description
search string Case-insensitive match on firstName or lastName
type player | volunteer Filters by ID prefix (BRN / MHC)
status active | retired Filters by isRetired flag
yearJoined integer Exact year match
sortBy id | name | yearJoined | games | goals | age id Sort column
sortDir asc | desc asc Sort direction
page integer ≥ 1 1 Page number
pageSize integer 1–500 50 Records per page

GET /members response envelope:

{
  "data": [ /* Member[] — scalar fields only, no relations */ ],
  "total": 250,
  "page": 1,
  "pageSize": 50
}

GET /members/:id response — full member with relations:

{
  "id": "BRN001",
  "firstName": "...",
  "approximateDob": "1960-01-01T00:00:00.000Z",
  "yearJoined": 1978,
  "gamesPlayedTotal": 312,
  "...",
  "recruitedBy": { "id": "MHC000", "firstName": "Jack", "lastName": "Fox" },
  "recruits": [ { "id": "BRN005", ... } ],
  "committeeRoles": [ { "id": 1, "position": "President", "year": 1985 } ],
  "trophies": [ { "id": 3, "awardName": "Brian Wilson Memorial Trophy", "year": 1990 } ],
  "grandFinals": [ { "memberId": "BRN001", "grandFinalId": "GF_1988_1C", "isCaptain": false, "grandFinal": { ... } } ]
}

Recruitment tree — recursive structure:

{
  "id": "BRN001",
  "firstName": "...",
  "yearJoined": 1978,
  "recruits": [
    {
      "id": "BRN010",
      "recruits": [ ... ]
    }
  ]
}

Grand Finals

Method Path Auth Description
GET /grand-finals None All grand finals with rosters (ordered year desc, grade asc)
GET /grand-finals/:id None Single grand final with roster
POST /grand-finals Bearer JWT Create grand final
PUT /grand-finals/:id Bearer JWT Update grand final
DELETE /grand-finals/:id Bearer JWT Delete grand final
GET /grand-finals/:grandFinalId/roster None Roster for a specific grand final
POST /grand-finals/:grandFinalId/roster Bearer JWT Add member to roster
DELETE /grand-finals/:grandFinalId/roster/:memberId Bearer JWT Remove member from roster

Grand final ID format: alphanumeric with underscores/dashes only (e.g. GF_2023_1st).

result field is an enum: Win, Loss, or Draw.

Trophies

Method Path Auth Description
GET /trophies None All trophies with member detail (year desc, name asc)
GET /trophies/:id None Single trophy
POST /trophies Bearer JWT Create trophy
PUT /trophies/:id Bearer JWT Update trophy
DELETE /trophies/:id Bearer JWT Delete trophy

Committee Roles

Method Path Auth Description
GET /committee-roles None All committee roles with member detail (year desc, position asc)
GET /committee-roles/:id None Single role
POST /committee-roles Bearer JWT Create role
PUT /committee-roles/:id Bearer JWT Update role
DELETE /committee-roles/:id Bearer JWT Delete role

Years

Method Path Auth Description
GET /years None Sorted list of all years that have any data (excludes placeholder 1970)
GET /years/:year None Aggregated overview for a year: members joined, committee, grand finals, trophies, life members inducted

7. Frontend — React SPA

Technology Stack

Package Version Role
react ^19.2 UI framework
react-dom ^19.2 DOM rendering
react-router-dom ^7.14 Client-side routing
vite ^8.0 Build tool + dev server

No UI component library — all styles are custom CSS with CSS custom properties (variables) for theming.

Route Map

Path Component Description
/ /members redirect Default route
/login LoginPage Admin login form
/members MembersPage Paginated, filterable member directory
/members/new MemberFormPage Create member form (auth required)
/members/:id MemberDetailPage Full member profile
/members/:id/edit MemberFormPage Edit member (auth required)
/members/:id/recruitment-tree RecruitmentTreePage Interactive tree visualisation
/grand-finals GrandFinalsPage All grand finals list
/grand-finals/new GrandFinalDetailPage Create grand final (auth required)
/grand-finals/:id GrandFinalDetailPage Grand final detail + roster management
/trophies TrophiesPage Full trophy/award history
/committee CommitteePage Committee roles across all years
/years YearOverviewPage Year selector + aggregate view
/years/:year YearOverviewPage Specific year overview
/history HistoryPage Static club history timeline

State Management

No Redux or Zustand — state is managed via:

  • URL search params — all filter/sort/pagination state for the members list lives in the URL (?search=…&type=player&page=2). This makes state persistent, shareable, and gives browser history navigation for free.
  • React ContextAuthContext provides user, isAuthenticated, login(), logout(), and loading to all components via useAuth() hook.
  • Local useState — loading, error, and page-level data state per component.

AuthContext (src/contexts/AuthContext.jsx)

On mount:

  1. Reads the stored JWT from localStorage via tokenStore.getToken().
  2. If a token exists, calls GET /api/auth/me to validate it server-side and hydrate the user object.
  3. Subscribes to tokenStore changes (e.g. 401 auto-logout from api.js clears the token → context re-validates).

On login:

  1. Calls POST /api/auth/login.
  2. Stores the received JWT via tokenStore.setToken().
  3. Sets user state directly from the response.

Token Store (src/services/tokenStore.js)

A minimal pub/sub store backed by localStorage:

const KEY = 'mhc_token';
const listeners = new Set();

export const getToken  = () => localStorage.getItem(KEY);
export const setToken  = (token) => { /* set or remove */ listeners.forEach(cb => cb(token)); };
export const subscribe = (cb) => { listeners.add(cb); return () => listeners.delete(cb); };

When api.js detects a 401 response, it calls setToken(null) — this notifies AuthContext, which re-validates (finds no token) and sets user to null, causing the UI to reflect logged-out state.

API Service (src/services/api.js)

A thin fetch wrapper:

  • BASE_URL = import.meta.env.VITE_API_URL || '/api' — defaults to same-origin /api, which nginx proxies to the server container. Override via Vite env var for non-containerised development.
  • Automatically attaches Authorization: Bearer <token> header when a token is in the store.
  • On any non-2xx response, parses the JSON error body and throws new Error(err.error).
  • On 204 No Content, returns null instead of trying to parse an empty body.

Dark Mode

Implemented in Layout.jsx:

  • State seeded from localStorage.getItem('theme') === 'dark'.
  • document.documentElement.setAttribute('data-theme', ...) toggles the root attribute.
  • All CSS is written against [data-theme="dark"] and [data-theme="light"] custom-property overrides.
  • Preference persisted to localStorage on every toggle.

Pages of Note

MembersPage — the most complex page:

  • All filter/sort/pagination state is in URL search params via useSearchParams.
  • Uses a separate searchDraft state for the text input to avoid fetching on every keystroke; fetch is triggered only on form submit.
  • updateParams() helper merges param updates while resetting the page to 1 when filters change.
  • Sortable column headers (SortHeader component) toggle direction when clicking an active column.

RecruitmentTreePage — renders the recursive tree returned by the API:

  • A recursive TreeNode component handles collapse/expand at each node.
  • Depth is tracked via a CSS custom property --depth for indentation.

HistoryPage — a static timeline of club milestones hardcoded as a JS array. Not driven by the API.

YearOverviewPage — fetches /years on mount for the year selector, then fetches /years/:year when a year is selected. Groups committee members by position using a predefined display-order array.


8. Authentication & Authorisation

Model

Single-admin model — one username/password pair stored as environment variables. There is no user table or registration flow.

Password Storage

The admin password is never stored in plaintext. A bcrypt hash is stored in ADMIN_PASSWORD_HASH and generated offline using server/scripts/hashPassword.js. At login, bcrypt.compare() is always called regardless of whether the username matched — this prevents timing-based username enumeration.

JWT

  • Algorithm: HS256 (implicit in jsonwebtoken default)
  • Payload: { sub: adminUsername, role: 'admin', iat, exp }
  • Expiry: 8 hours (configurable via TOKEN_TTL env var)
  • Secret: validated at startup — if JWT_SECRET is not set, the server refuses to start:
    if (!JWT_SECRET) throw new Error('JWT_SECRET is not set. Refusing to start.');

requireAuth Middleware

Reads Authorization: Bearer <token> header. Returns 401 if:

  • Header is missing or scheme is not Bearer
  • jwt.verify() throws (invalid signature, expired, malformed)

On success, sets req.user to the decoded payload and calls next().

Route Protection Policy

Operation Protected?
All GET routes Public
POST /auth/login Public (but rate-limited at 10/15min/IP)
All POST, PUT, DELETE routes requireAuth required

9. Security Controls

Rate Limiting

Three buckets implemented with express-rate-limit:

Bucket Applied to Limit
General All /api routes 300 req / 15 min / IP
Write All POST/PUT/PATCH/DELETE on /api 30 req / 15 min / IP
Login POST /api/auth/login specifically 10 req / 15 min / IP

All buckets use standard RateLimit-* headers (standardHeaders: true), and legacy X-RateLimit-* headers are disabled.

HTTP Security Headers (helmet)

helmet sets all of the following response headers:

Header Value / Effect
Strict-Transport-Security HSTS with includeSubDomains
X-Content-Type-Options nosniff — prevents MIME sniffing
X-Frame-Options SAMEORIGIN — prevents clickjacking
X-XSS-Protection Disabled (modern browsers use CSP instead)
Referrer-Policy no-referrer
Cross-Origin-Resource-Policy cross-origin (explicitly set — required for the API to be consumed by the SPA on the same origin through nginx)

CORS

  • Allowlist-driven: only origins in FRONTEND_ORIGIN are permitted.
  • Non-browser clients (no Origin header) pass through (necessary for server-to-server and health checks).
  • credentials: true allows cookies to be sent (future-proofing; currently only Bearer tokens are used).
  • CORS denial returns 403 { error: 'Origin not allowed' }.

Input Validation (Zod)

Every mutating endpoint (and the member list GET) passes through a Zod schema:

  • .strict() on all object schemas — unknown keys are rejected with a 400 error, preventing mass-assignment attacks.
  • Member ID format enforced by regex ^(BRN|MHC)\d{3}$.
  • Grand Final ID restricted to alphanumeric + underscores/dashes.
  • All string fields have explicit max-length caps.
  • All integer fields have min/max bounds (years: 1900–2100, counts: 0–100,000).
  • Request body is replaced with the parsed (coerced + stripped) Zod output before reaching the controller.

Payload Size Cap

express.json({ limit: '50kb' }) — requests with a body larger than 50 KB are rejected with 413.

Error Information Leakage

In NODE_ENV=production, unhandled errors return a generic { error: 'Internal server error' } — no stack traces, Prisma error codes, or schema details are sent to the client. Full error details are logged server-side only.

PII / Data Minimisation

Dates of birth are normalised server-side to YYYY-01-01 before database persistence — individual's birth day and month are never stored. See §10 for full detail.


10. Data / Privacy Rules

Date of Birth (PII)

The approximateDob column always stores 01/01/YYYY (January 1st of birth year). The sanitiseDob() function in membersController.js enforces this on both POST and PUT:

const sanitiseDob = (raw) => {
  const d = new Date(raw);
  if (isNaN(d.getTime())) throw new HttpError(400, 'Invalid approximateDob');
  return new Date(`${d.getFullYear()}-01-01T00:00:00.000Z`);
};

The frontend displays only the birth year and a derived approximate age (currentYear - birthYear). No day or month is stored or displayed.

No Other PII

The schema contains no email addresses, phone numbers, physical addresses, or government identifiers. The audit confirmed this.

Member ID Convention

Prefix Meaning
BRN### Playing member ("Baggy Red Number")
MHC### Non-playing volunteer / administrator

MHC000 is a reserved ID for the club founder used as a sentinel "original member" node in the recruitment tree. The getYearOverview controller explicitly excludes MHC000 from "members joined in year" lists.


11. Development Workflow

Prerequisites

  • Docker & Docker Compose
  • Node.js 20+ (for running scripts locally)

Running Locally (Docker)

# Copy and fill in the env file
cp .env.example .env   # (create if not present — see §3 for required vars)

# Start all services
docker compose up --build

# App available at http://localhost:80

Running in Dev Mode (without Docker)

Requires a local PostgreSQL instance. Set DATABASE_URL in server/.env.

# Terminal 1 — API server
cd server
npm install
npx prisma migrate dev   # Apply migrations
npx prisma db seed       # (optional) seed data
npm run dev              # nodemon on port 5000

# Terminal 2 — React dev server
cd client
npm install
npm run dev              # Vite on port 5173, proxies /api → localhost:5000

Seeding

server/prisma/seed.js is the entry point. The server/prisma/ directory contains numerous one-off data-load scripts (CSV importers, fixup scripts) used during initial data migration. These are not part of the normal seed flow — they were used manually during the data-migration phase.

Generating a Password Hash

cd server
node scripts/hashPassword.js
# Follow the prompt; copy the resulting hash into ADMIN_PASSWORD_HASH env var

Prisma Commands

# From server/
npx prisma migrate dev        # Create & apply a new migration (dev only)
npx prisma migrate deploy     # Apply pending migrations (production)
npx prisma generate           # Regenerate PrismaClient after schema change
npx prisma studio             # Open Prisma Studio GUI (dev only)
npx prisma db seed            # Run seed.js

Key Scripts (server/scripts/)

Script Purpose
hashPassword.js Generate bcrypt hash for ADMIN_PASSWORD_HASH env var
checkMhcIds.js Validate member ID consistency
retireVolunteers.js Bulk-set retirement flags
seedGrandFinals.js / seedGrandFinals2.js Historical grand final data load
seedStirrerTrophies.js Load stirrer-of-year trophy data
setActiveRoster.js Manage current-year roster
setCaptains.js Mark captains in grand final rosters

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Monterey Hockey Club Stats, Data & History

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