FROM node:20-alpine

WORKDIR /app

COPY package.json ./
RUN npm install --omit=dev && npm cache clean --force

COPY src ./src

ENV NODE_ENV=production
ENV POSTPLAN_HTML_DIR=/data/html

RUN mkdir -p /data/html

EXPOSE 3000

HEALTHCHECK --interval=10s --timeout=5s --start-period=10s --retries=10 \
  CMD node -e "fetch('http://127.0.0.1:3000/healthz').then((r)=>process.exit(r.ok?0:1)).catch(()=>process.exit(1))"

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