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

.gitignore

@@ -136,4 +136,7 @@ logs/
 *.log
 
 # token
-tokens/
+tokens/
+
+# certs
+certs/