Refactor Docker setup and frontend structure

- Updated Dockerfile to copy frontend files to meshchatx/public directory.
- Modified .dockerignore to include meshchatx/public.
- Added a new script to prepare the frontend directory.
- Adjusted Vite configuration to output to the new public directory.
- Updated GitHub Actions workflow to reflect changes in build process and artifact handling.

Makefile

@@ -39,6 +39,7 @@ clean:
 	rm -rf build
 	rm -rf dist
 	rm -rf python-dist
+	rm -rf meshchatx/public
 
 sync-version:
 	$(PYTHON) scripts/sync_version.py