Run the whole stack in Docker

- API and web images built with turbo prune; the API image also runs the
  worker and migrations. Non-root, health-checked, Debian slim.
- docker compose up -d --build starts Postgres, Redis (persistent), a
  one-shot migrate job, API, worker and web, in dependency order.
- Fix the API production build (tsup flags moved to a config file) and
  bundle the migration script; silence Postgres NOTICE noise.
- npm run infra:up now starts only Postgres and Redis for hot-reload dev.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01MzFywujuH9TiuXbr9vjoX8

apps/web/next.config.ts

@@ -1,7 +1,12 @@
+import { fileURLToPath } from 'node:url';
 import type { NextConfig } from 'next';
 
 const config: NextConfig = {
   transpilePackages: ['@musicshare/shared'],
+  // Self-contained server bundle for the Docker image (only the files it needs).
+  output: 'standalone',
+  // Monorepo: trace files from the repo root so the shared package is included.
+  outputFileTracingRoot: fileURLToPath(new URL('../..', import.meta.url)),
 };
 
 export default config;