- Implemented a new proxy route in `routes/proxy.js` to fetch content from external URLs.
- The proxy handles URL validation, stripping of certain headers, and rewriting of relative URLs to absolute.
- Added a new batch script `start.bat` for easier server startup and dependency installation.
- Included instructions for accessing the server and default admin credentials in the batch script.
- Added a new release file `rainweb-win.zip`.
