FROM node:20-alpine

WORKDIR /usr/src/app

COPY package.json ./
RUN npm install --omit=dev

COPY server.js ./

USER node

EXPOSE 3000

HEALTHCHECK --interval=30s --timeout=5s --start-period=10s --retries=3 \
  CMD wget -qO- http://localhost:3000/health || exit 1

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