Initial commit: Complete NodeJS-native setup

- Migrated from Python pre-commit to NodeJS-native solution
- Reorganized documentation structure
- Set up Husky + lint-staged for efficient pre-commit hooks
- Fixed Dockerfile healthcheck issue
- Added comprehensive documentation index

jest.config.json

@@ -0,0 +1,26 @@
+{
+  "preset": "ts-jest",
+  "testEnvironment": "jsdom",
+  "setupFilesAfterEnv": ["<rootDir>/tests/setup.ts"],
+  "testMatch": [
+    "<rootDir>/services/**/__tests__/**/*.test.ts",
+    "<rootDir>/tests/**/*.test.ts",
+    "<rootDir>/tests/**/*.test.js"
+  ],
+  "collectCoverageFrom": [
+    "services/**/*.ts",
+    "components/**/*.tsx",
+    "hooks/**/*.ts",
+    "utils/**/*.ts",
+    "!**/*.d.ts",
+    "!**/__tests__/**"
+  ],
+  "coverageDirectory": "coverage",
+  "coverageReporters": ["text", "lcov", "html"],
+  "moduleNameMapping": {
+    "^@/(.*)$": "<rootDir>/$1"
+  },
+  "transform": {
+    "^.+\\.tsx?$": "ts-jest"
+  }
+}