feat: add Docker bootstrap for mcpd with auto-migration and seeding

Adds Dockerfile, entrypoint, and server bootstrap so that
`docker compose up` starts postgres, pushes the schema,
seeds default MCP servers, and starts mcpd with all routes wired up.

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

src/mcpd/package.json

@@ -9,7 +9,7 @@
     "build": "tsc --build",
     "clean": "rimraf dist",
     "dev": "tsx watch src/index.ts",
-    "start": "node dist/index.js",
+    "start": "node dist/main.js",
     "test": "vitest",
     "test:run": "vitest run"
   },