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/jest.config.unit.js

@@ -0,0 +1,37 @@
+const nextJest = require('next/jest')
+
+const createJestConfig = nextJest({
+  // Provide the path to your Next.js app to load next.config.js and .env files
+  dir: './',
+})
+
+// Unit tests configuration - runs in Node.js environment
+const unitJestConfig = {
+  displayName: 'Unit Tests',
+  setupFilesAfterEnv: ['<rootDir>/jest.setup.js'],
+  moduleNameMapper: {
+    // Handle module aliases
+    '^@/(.*)$': '<rootDir>/src/$1',
+  },
+  testEnvironment: 'jest-environment-jsdom',
+  collectCoverageFrom: [
+    'src/**/*.{js,jsx,ts,tsx}',
+    '!src/**/index.ts',
+    '!src/**/*.d.ts',
+    '!src/__tests__/**',
+  ],
+  testPathIgnorePatterns: [
+    '<rootDir>/.next/',
+    '<rootDir>/node_modules/',
+    '<rootDir>/src/__tests__/integration.test.ts',
+    '<rootDir>/src/__tests__/e2e-docker.test.ts',
+    '<rootDir>/src/__tests__/browser-integration.test.ts'
+  ],
+  testMatch: [
+    '<rootDir>/src/**/*.test.{js,jsx,ts,tsx}',
+    '<rootDir>/src/**/*.unit.test.{js,jsx,ts,tsx}'
+  ]
+}
+
+// createJestConfig is exported this way to ensure that next/jest can load the Next.js config which is async
+module.exports = createJestConfig(unitJestConfig)