Updated backend

- Added better anti DoS protection
- Added better security measures (HTTP headers, etc.)
- Added TLS support
- Added support for configurable rate limiting
- Added default 404 and error handling
- Updated proxy settings
- Updated env naming

package.json

@@ -17,9 +17,11 @@
   "dependencies": {
     "cookie-parser": "^1.4.6",
     "cors": "^2.8.5",
-    "express": "^4.18.2",
+    "express": "^4.19.2",
     "express-rate-limit": "^7.1.4",
     "express-slow-down": "^2.0.1",
+    "helmet": "^7.1.0",
+    "https": "^1.0.0",
     "jsonwebtoken": "^9.0.2",
     "level": "^8.0.1",
     "morgan": "^1.10.0",