feat: implement docker infrastructure (US-001)

- Add docker-compose.yml with postgres, redis, api, and web services
- Add multi-stage Dockerfile for API (Python 3.11)
- Add multi-stage Dockerfile for web (Node.js 20 + nginx)
- Add Makefile with common development commands
- Add .env.example with all required environment variables
- Add placeholder pyproject.toml and package.json for builds
- Configure health checks for all services
- Setup persistent volumes for postgres, redis, and repos
- Run services as non-root users

.claude/settings.json

@@ -1,26 +0,0 @@
-{
-  "hooks": {
-    "PreCompact": [
-      {
-        "hooks": [
-          {
-            "command": "bd prime",
-            "type": "command"
-          }
-        ],
-        "matcher": ""
-      }
-    ],
-    "SessionStart": [
-      {
-        "hooks": [
-          {
-            "command": "bd prime",
-            "type": "command"
-          }
-        ],
-        "matcher": ""
-      }
-    ]
-  }
-}