Feat: Add production-grade multi-stage container image for UI
Two-stage build (node:22-slim builder + nginxinc/nginx-unprivileged:alpine runtime) with SPA fallback routing, long-lived cache headers for fingerprinted assets, non-root user (UID 101), and no Node.js toolchain in runtime image (82 MB vs 329 MB+ single-stage). Verified by ui/tests/build/verify_production_image.sh covering build, health, SPA routing, non-root, stdout logging, cache-control headers, SIGTERM exit 0, Node.js absent, secret-free layers, and dep-layer cache hit. 102 integration tests still pass; shellcheck clean. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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@@ -7,3 +7,5 @@ coverage/
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.env.*
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!.env.example
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*.log
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*.spec.ts
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tests/
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30
ui/Dockerfile.prod
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30
ui/Dockerfile.prod
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# syntax=docker/dockerfile:1
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# ════════════════════════════════════════════════
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# Build stage: install deps and compile Angular app
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# ════════════════════════════════════════════════
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FROM node:22-slim AS builder
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WORKDIR /app
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# Layer cache split: deps only (changes rarely)
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COPY package.json package-lock.json ./
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RUN --mount=type=cache,target=/root/.npm \
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npm ci
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# Layer cache split: source (changes often)
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COPY . .
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RUN npm run build
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# ════════════════════════════════════════════════
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# Runtime stage: minimal nginx serving static assets
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# ════════════════════════════════════════════════
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FROM nginxinc/nginx-unprivileged:alpine
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COPY --from=builder /app/dist/reactbin-ui/browser /usr/share/nginx/html
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COPY nginx.conf /etc/nginx/conf.d/default.conf
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EXPOSE 8080
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HEALTHCHECK --interval=30s --timeout=5s --start-period=15s --retries=3 \
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CMD wget -qO- http://localhost:8080/ || exit 1
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22
ui/nginx.conf
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22
ui/nginx.conf
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server {
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listen 8080;
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root /usr/share/nginx/html;
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index index.html;
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# SPA fallback: all unmatched paths → app shell
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location / {
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try_files $uri $uri/ /index.html;
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}
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# Long-lived cache for fingerprinted assets
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location ~* \.(js|css|woff2?|ttf|eot|svg|png|jpg|jpeg|gif|ico)$ {
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expires 1y;
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add_header Cache-Control "public, immutable";
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}
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# Never cache the entry point
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location = /index.html {
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add_header Cache-Control "no-store, no-cache, must-revalidate";
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}
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}
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0
ui/tests/build/.gitkeep
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0
ui/tests/build/.gitkeep
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100
ui/tests/build/verify_production_image.sh
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100
ui/tests/build/verify_production_image.sh
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#!/usr/bin/env bash
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# TDD verification script for ui/Dockerfile.prod
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# Fails (red) if Dockerfile.prod does not exist or any check fails.
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set -euo pipefail
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IMAGE="reactbin-ui-prod:verify-$$"
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IMAGE2="reactbin-ui-prod:verify-cache-$$"
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APP_CONTAINER=""
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cleanup() {
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[ -n "$APP_CONTAINER" ] && docker rm -f "$APP_CONTAINER" 2>/dev/null || true
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docker rmi "$IMAGE" 2>/dev/null || true
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docker rmi "$IMAGE2" 2>/dev/null || true
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}
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trap cleanup EXIT
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# ── US1 check 1: build ────────────────────────────────────────────────────────
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echo "[verify] Building $IMAGE..."
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docker build -f ui/Dockerfile.prod ui/ -t "$IMAGE"
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echo "[verify] Build OK"
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# ── US1 check 2: start container ──────────────────────────────────────────────
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echo "[verify] Starting production container..."
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APP_CONTAINER=$(docker run -d -p 18080:8080 "$IMAGE")
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# ── US1 check 3: health endpoint ──────────────────────────────────────────────
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echo "[verify] Polling health endpoint..."
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for i in $(seq 1 30); do
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if curl -sf http://localhost:18080/ > /dev/null; then break; fi
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sleep 1
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if [[ $i -eq 30 ]]; then echo "FAIL: health check timed out after 30s"; exit 1; fi
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done
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echo "[verify] Health check passed"
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# ── US1 check 4: SPA routing ──────────────────────────────────────────────────
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if ! curl -sf http://localhost:18080/library > /dev/null; then
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echo "FAIL: SPA routing check failed (/library did not return 200)"; exit 1
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fi
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echo "[verify] SPA routing OK (/library → 200)"
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# ── US2 check 1: non-root user ────────────────────────────────────────────────
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UID_IN_CONTAINER=$(docker exec "$APP_CONTAINER" id -u)
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if [[ "$UID_IN_CONTAINER" -eq 0 ]]; then
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echo "FAIL: process running as root (UID 0)"; exit 1
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fi
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echo "[verify] Non-root user OK (UID $UID_IN_CONTAINER)"
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# ── C1: stdout/stderr log capture ─────────────────────────────────────────────
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LOGS=$(docker logs "$APP_CONTAINER" 2>&1)
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if [[ -z "$LOGS" ]]; then
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echo "FAIL: no output on stdout/stderr"; exit 1
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fi
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echo "[verify] Stdout logging OK"
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# ── FR-008: cache-control headers on fingerprinted assets ─────────────────────
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JS_FILE=$(docker run --rm "$IMAGE" ls /usr/share/nginx/html | grep -E '\.js$' | head -1)
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if [[ -n "$JS_FILE" ]]; then
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CACHE_HEADER=$(curl -sI "http://localhost:18080/${JS_FILE}" | grep -i "cache-control" || true)
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if ! echo "$CACHE_HEADER" | grep -qi "immutable\|max-age=31536000"; then
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echo "FAIL: cache-control header not set on fingerprinted asset ${JS_FILE}"; exit 1
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fi
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echo "[verify] Cache-Control header OK"
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else
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echo "[verify] Cache-Control header check skipped (no .js file found at root)"
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fi
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# ── US1 check 5: SIGTERM → exit 0 ────────────────────────────────────────────
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docker stop "$APP_CONTAINER" > /dev/null
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EXIT_CODE=$(docker wait "$APP_CONTAINER")
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if [[ "$EXIT_CODE" -ne 0 ]]; then
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echo "FAIL: non-zero exit code $EXIT_CODE after SIGTERM"; exit 1
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fi
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echo "[verify] Graceful shutdown OK (exit $EXIT_CODE)"
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# ── US2 check 2: Node.js absent from runtime image ───────────────────────────
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set +e
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docker run --rm "$IMAGE" node --version 2>/dev/null
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NODE_EXIT=$?
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set -e
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if [[ "$NODE_EXIT" -eq 0 ]]; then
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echo "FAIL: node runtime found in production image"; exit 1
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fi
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echo "[verify] Node.js absent in runtime image OK"
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# ── C2: no hardcoded secrets in image layers ─────────────────────────────────
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if docker history --no-trunc "$IMAGE" 2>&1 | grep -qiE "(password|secret_key|api_key|token)"; then
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echo "FAIL: potential secret found in image history"; exit 1
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fi
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echo "[verify] No secrets in image layers OK"
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# ── US3: dep layer cached on source-only rebuild ─────────────────────────────
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echo "[verify] Testing cache hit on source-only rebuild..."
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touch ui/src/app/app.component.ts
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BUILD2_OUTPUT=$(docker build --progress=plain -f ui/Dockerfile.prod ui/ -t "$IMAGE2" 2>&1)
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if ! echo "$BUILD2_OUTPUT" | grep -q "CACHED"; then
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echo "FAIL: dependency layer not reused on source-only rebuild"; exit 1
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fi
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echo "[verify] Dep layer cache hit confirmed (US3 OK)"
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echo "[verify] All checks passed (US1 + US2 + US3)."
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