Dockerfile

# Stage 1: Base image and pnpm setup
FROM node:22-alpine AS base
ENV PNPM_HOME="/pnpm"
ENV PATH="$PNPM_HOME:$PATH"
RUN npm install -g pnpm@9

# Stage 2: Install dependencies
FROM base AS deps
RUN apk add --no-cache libc6-compat
WORKDIR /app
COPY package.json pnpm-lock.yaml ./
RUN --mount=type=cache,id=pnpm,target=/pnpm/store pnpm install --frozen-lockfile

# Stage 3: Build the application
FROM base AS builder
WORKDIR /app
COPY --from=deps /app/node_modules ./node_modules
COPY . .
ENV NEXT_TELEMETRY_DISABLED 1

# Receive the args from docker-compose
ARG DATABASE_URL
ENV DATABASE_URL=$DATABASE_URL
ARG NEXT_PUBLIC_APP_URL
ENV NEXT_PUBLIC_APP_URL=$NEXT_PUBLIC_APP_URL

# FIX: Dummy variables to satisfy strict SDK constructors during the build phase
ENV RESEND_API_KEY="re_dummy_key_for_build"
ENV UPSTASH_REDIS_REST_URL="https://dummy.upstash.io"
ENV UPSTASH_REDIS_REST_TOKEN="dummy_token"
ENV ENCRYPTION_KEY="0000000000000000000000000000000000000000000000000000000000000000"

RUN npm run build

# Stage 4: Production server (Runner)
FROM base AS runner
WORKDIR /app

ENV NODE_ENV production
ENV NEXT_TELEMETRY_DISABLED 1

# Create a non-root user for security
RUN addgroup --system --gid 1001 nodejs
RUN adduser --system --uid 1001 nextjs

# Copy the public directory
COPY --from=builder /app/public ./public

# Set the correct permissions for the prerender cache
RUN mkdir .next
RUN chown nextjs:nodejs .next

# Automatically leverage output traces to reduce image size
COPY --from=builder --chown=nextjs:nodejs /app/.next/standalone ./
COPY --from=builder --chown=nextjs:nodejs /app/.next/static ./.next/static

# Switch to non-root user
USER nextjs

EXPOSE 3000

ENV PORT 3000
ENV HOSTNAME "0.0.0.0"

CMD ["node", "server.js"]