Prepare production branch: remove test files and add Dockerfile

- Remove all test files (__tests__, *.test.*, *.spec.*)
- Remove Jest configuration files (jest.config.js, jest.setup.js)
- Remove test-related scripts from package.json
- Remove Jest dependencies from package.json
- Add production Dockerfile for standalone Next.js app
- Update tsconfig.json exclusions

🤖 Generated with [Claude Code](https://claude.ai/code)

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

tsconfig.json

@@ -37,7 +37,6 @@
   ],
   "exclude": [
     "node_modules",
-    "scripts",
-    "__tests__"
+    "scripts"
   ]
 }