Website restoration: Node.js backend, restored design, GitHub sync disabled

- Replaced broken .NET backend with Node.js/Express
- Restored original website design with purple gradient hero
- Updated homepage and shop pages with Bootstrap 5 responsive design
- Disabled GitHub remote sync - all code now stored locally only
- Created backup scripts and documentation
- All changes saved on Ubuntu server at /var/www/SkyArtShop

backend/node_modules/mime/cli.js

@@ -0,0 +1,8 @@
+#!/usr/bin/env node
+
+var mime = require('./mime.js');
+var file = process.argv[2];
+var type = mime.lookup(file);
+
+process.stdout.write(type + '\n');
+