feat: enhance README and TODO documentation, implement mobile menu functionality in Header component

- Updated README.md with project details, quick start instructions, and tech stack.
- Expanded TODO.md to reflect current project status and backlog items, including Linear ticket synchronization.
- Added mobile menu toggle functionality in Header component with corresponding tests for user interactions.
- Configured Next.js for Docker deployment and optimized build settings.

proto/src/lib/mongodb.test.ts

@@ -30,7 +30,7 @@ jest.mock('mongodb', () => ({
 // Restore environment before tests
 const originalEnv = process.env
 
-describe('MongoDB Connection', () => {
+describe('MongoDB Connection (Unit Tests)', () => {
   beforeEach(() => {
     process.env = {
       ...originalEnv,