Scaffold homelab-monitor: Fastify API + React dashboard + CI

Vertical slice for Phase 1 (v1-dashboard milestone): Proxmox collector,
SQLite storage, local auth, and a dashboard UI showing host/container
status cards. Config-driven collector registry so future data sources
(SSH-based hosts, Zabbix, network discovery) plug in without rewiring.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

apps/api/Dockerfile

@@ -0,0 +1,19 @@
+FROM node:22-bookworm-slim AS build
+WORKDIR /app
+# better-sqlite3 needs a native build toolchain
+RUN apt-get update && apt-get install -y --no-install-recommends python3 make g++ && rm -rf /var/lib/apt/lists/*
+COPY package.json ./
+RUN npm install
+COPY tsconfig.json ./
+COPY src ./src
+RUN npm run build
+
+FROM node:22-bookworm-slim
+WORKDIR /app
+RUN apt-get update && apt-get install -y --no-install-recommends python3 make g++ && rm -rf /var/lib/apt/lists/*
+COPY package.json ./
+RUN npm install --omit=dev
+COPY --from=build /app/dist ./dist
+ENV NODE_ENV=production
+EXPOSE 3000
+CMD ["node", "dist/index.js"]