chore: update Docker and CI for web + backend architecture

Replace scraper container with backend API container. Web image no
longer mounts a data volume or ships SQLite. Backend image runs Hono
server with node-cron scheduler, owns the database exclusively.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Dockerfile

@@ -1,19 +1,21 @@
-# Stage 1: Install all dependencies (dev included — scraper needs tsx + playwright)
-FROM node:22-bookworm-slim AS deps
-RUN apt-get update && apt-get install -y --no-install-recommends python3 make g++ && \
-    rm -rf /var/lib/apt/lists/*
+# ── builder: Next.js production build ────────────────────────────────────────
+FROM node:22-bookworm-slim AS builder
 WORKDIR /app
 COPY package.json package-lock.json* ./
 RUN npm ci
-
-# Stage 2: Build the Next.js app
-FROM deps AS builder
 COPY . .
 RUN npm run build
 
+# ── backend-deps: backend node_modules (better-sqlite3 needs build tools) ────
+FROM node:22-bookworm-slim AS backend-deps
+RUN apt-get update && apt-get install -y --no-install-recommends python3 make g++ && \
+    rm -rf /var/lib/apt/lists/*
+WORKDIR /app
+COPY backend/package.json backend/package-lock.json* ./
+RUN npm ci
+
 # ── web ──────────────────────────────────────────────────────────────────────
-# Minimal Next.js runner. No playwright, no tsx, no scripts.
-# next build --output standalone bundles its own node_modules (incl. better-sqlite3).
+# Minimal Next.js standalone runner. No database, no native modules.
 FROM node:22-bookworm-slim AS web
 WORKDIR /app
 
@@ -27,44 +29,34 @@ COPY --from=builder --chown=nextjs:nodejs /app/.next/standalone ./
 COPY --from=builder --chown=nextjs:nodejs /app/.next/static ./.next/static
 COPY --from=builder --chown=nextjs:nodejs /app/public ./public
 
-RUN mkdir -p /app/data && chown nextjs:nodejs /app/data
-VOLUME ["/app/data"]
-
 USER nextjs
 EXPOSE 3000
 ENV PORT=3000
 ENV HOSTNAME="0.0.0.0"
 CMD ["node", "server.js"]
 
-# ── scraper ───────────────────────────────────────────────────────────────────
-# Scraper-only image. No Next.js output. Runs on a nightly schedule via
-# scripts/scrape-schedule.sh. Staleness windows are configurable via env vars:
-#   PARK_HOURS_STALENESS_HOURS  (default: 72)
-#   COASTER_STALENESS_HOURS     (default: 720 = 30 days)
-FROM node:22-bookworm-slim AS scraper
+# ── backend ──────────────────────────────────────────────────────────────────
+# Hono API server + node-cron scheduler. Owns the SQLite database exclusively.
+FROM node:22-bookworm-slim AS backend
 WORKDIR /app
 
 ENV NODE_ENV=production
-ENV PLAYWRIGHT_BROWSERS_PATH=/app/.playwright
 
 RUN addgroup --system --gid 1001 nodejs && \
     adduser --system --uid 1001 nextjs
 
-COPY --from=builder --chown=nextjs:nodejs /app/scripts ./scripts
-COPY --from=builder --chown=nextjs:nodejs /app/lib ./lib
-COPY --from=builder --chown=nextjs:nodejs /app/tests ./tests
-COPY --from=builder --chown=nextjs:nodejs /app/package.json ./package.json
-COPY --from=builder --chown=nextjs:nodejs /app/tsconfig.json ./tsconfig.json
-
-# Full node_modules — includes tsx, playwright, better-sqlite3, all devDeps
-COPY --from=deps --chown=nextjs:nodejs /app/node_modules ./node_modules
-
-# Install Playwright Chromium + system libraries (runs as root, then fixes ownership)
-RUN npx playwright install --with-deps chromium && \
-    chown -R nextjs:nodejs /app/.playwright
+COPY --from=backend-deps --chown=nextjs:nodejs /app/node_modules ./backend/node_modules
+COPY --chown=nextjs:nodejs backend/src ./backend/src
+COPY --chown=nextjs:nodejs backend/package.json ./backend/package.json
+COPY --chown=nextjs:nodejs backend/tsconfig.json ./backend/tsconfig.json
+COPY --chown=nextjs:nodejs lib ./lib
 
 RUN mkdir -p /app/data && chown nextjs:nodejs /app/data
 VOLUME ["/app/data"]
 
 USER nextjs
-CMD ["sh", "/app/scripts/scrape-schedule.sh"]
+EXPOSE 3001
+ENV PORT=3001
+
+WORKDIR /app/backend
+CMD ["npx", "tsx", "src/index.ts"]