fix: update node version (#25)

* fix: update node version

* apply CodeRabbit CR fix

* Apply suggestions from code review

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

---------

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

Author: jcubic

Dockerfile

@@ -1,9 +1,12 @@
-FROM node:8
-LABEL maintainer "William Hilton <wmhilton@gmail.com>"
+FROM node:22-slim
+LABEL maintainer="William Hilton <wmhilton@gmail.com>"
 WORKDIR /srv
+COPY package.json package-lock.json ./
+RUN npm ci --omit=dev
 COPY . .
-RUN npm install
+RUN chown -R node:node /srv
+USER node
 EXPOSE 80
 ENV PORT=80
-CMD [ "npm", "start" ]
+CMD [ "sh", "-c", "exec node bin.js run --port=${PORT:-80}" ]