# Production image. Designed for a hardened runtime: read-only root filesystem,
# a tmpfs at /tmp, no Linux capabilities, and a reverse proxy in front.

FROM node:22-bookworm-slim AS deps
WORKDIR /app
COPY package.json package-lock.json ./
RUN npm ci --no-audit --no-fund

FROM node:22-bookworm-slim AS build
WORKDIR /app
ENV NEXT_TELEMETRY_DISABLED=1
COPY --from=deps /app/node_modules ./node_modules
COPY . .
RUN mkdir -p public && npm run build

FROM node:22-bookworm-slim AS runtime
WORKDIR /app
ENV NODE_ENV=production \
    NEXT_TELEMETRY_DISABLED=1 \
    PORT=3000 \
    HOSTNAME=0.0.0.0
COPY --from=build --chown=node:node /app/.next/standalone ./
COPY --from=build --chown=node:node /app/.next/static ./.next/static
COPY --from=build --chown=node:node /app/public ./public
# The root filesystem is read-only at runtime, so Next's cache goes to the /tmp tmpfs.
RUN rm -rf .next/cache && ln -s /tmp/next-cache .next/cache
USER node
EXPOSE 3000
HEALTHCHECK --interval=30s --timeout=5s --start-period=10s \
  CMD node -e "fetch('http://127.0.0.1:3000/').then(r=>process.exit(r.ok?0:1)).catch(()=>process.exit(1))"
CMD ["node", "server.js"]