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

.markdownlint.json

@@ -0,0 +1,18 @@
+{
+  "default": true,
+  "MD001": true,
+  "MD003": {
+    "style": "atx"
+  },
+  "MD007": {
+    "indent": 2
+  },
+  "MD013": {
+    "line_length": 120
+  },
+  "MD024": {
+    "allow_different_nesting": true
+  },
+  "MD033": false,
+  "MD041": false
+}