FROM node:24-bookworm-slim

WORKDIR /app
ENV NODE_ENV=production

COPY package.json ./
COPY src ./src
COPY public ./public

RUN mkdir -p /data && chown -R node:node /data /app

USER node
EXPOSE 3000
EXPOSE 25
EXPOSE 465
EXPOSE 587
EXPOSE 2525
VOLUME ["/data"]

HEALTHCHECK --interval=30s --timeout=5s --start-period=15s --retries=3 \
  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"]