Phase 8

Dockerfile

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+# Multi-stage build. NextChair is the internal project/image name only —
+# see docs/phase-8-summary.md's white-label section for why that's fine
+# here (Docker/package names are explicitly "internal and acceptable")
+# even though the running application never shows that name to a user.
+#
+# Prisma 7 uses driver adapters (@prisma/adapter-mariadb), not a native
+# Rust query-engine binary — the generated client is pure JS, so this
+# image needs no special native-binary handling the way older Prisma
+# versions on Alpine sometimes did.
+#
+# `output: "standalone"` in next.config.ts was deliberately NOT enabled:
+# this image runs `prisma migrate deploy` (and, for the optional seed
+# service, `tsx prisma/seed.ts`) at container start, both of which need
+# the full `prisma`/`tsx` CLIs and their dependencies present — a pruned
+# standalone bundle would need those re-added anyway, so a single
+# `npm ci` (full dependencies, including the small set of dev tools this
+# image actually runs) is simpler and no less correct. See
+# docs/phase-8-summary.md, "Docker image quality" for this trade-off.
+
+FROM node:22-alpine AS deps
+WORKDIR /app
+COPY package.json package-lock.json ./
+RUN npm ci
+
+FROM node:22-alpine AS builder
+WORKDIR /app
+COPY --from=deps /app/node_modules ./node_modules
+COPY . .
+# DATABASE_URL isn't needed to generate the client (no DB connection at
+# generate time) — only real values needed at runtime, never baked in here.
+RUN npx prisma generate
+# `next build`'s page-data collection step imports every route module
+# (including /api/health) to inspect it — that pulls in
+# src/lib/db/prisma.ts, which requires DATABASE_URL just to construct its
+# connection-pool config object, even though nothing actually connects at
+# build time. This placeholder only exists to satisfy that check; the
+# real value is supplied at container runtime via env_file (see
+# docker-compose.local.yaml) and this one is never used to connect to
+# anything or baked into a layer that matters.
+ENV DATABASE_URL="mysql://build:build@localhost:3306/build"
+RUN npm run build
+
+FROM node:22-alpine AS runner
+WORKDIR /app
+ENV NODE_ENV=production
+
+# Non-root — see the brief's "Docker image quality: non-root user."
+RUN addgroup --system --gid 1001 nodejs && adduser --system --uid 1001 nextchair
+
+COPY --from=builder --chown=nextchair:nodejs /app/node_modules ./node_modules
+COPY --from=builder --chown=nextchair:nodejs /app/.next ./.next
+COPY --from=builder --chown=nextchair:nodejs /app/public ./public
+COPY --from=builder --chown=nextchair:nodejs /app/generated ./generated
+COPY --from=builder --chown=nextchair:nodejs /app/prisma ./prisma
+COPY --from=builder --chown=nextchair:nodejs /app/src ./src
+COPY --from=builder --chown=nextchair:nodejs /app/package.json ./package.json
+COPY --from=builder --chown=nextchair:nodejs /app/prisma.config.ts ./prisma.config.ts
+COPY --from=builder --chown=nextchair:nodejs /app/next.config.ts ./next.config.ts
+COPY --from=builder --chown=nextchair:nodejs /app/tsconfig.json ./tsconfig.json
+COPY --chown=nextchair:nodejs docker/entrypoint.sh ./docker/entrypoint.sh
+RUN chmod +x ./docker/entrypoint.sh
+
+USER nextchair
+EXPOSE 3000
+ENV PORT=3000
+
+ENTRYPOINT ["./docker/entrypoint.sh"]