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/append-field/index.js

@@ -0,0 +1,12 @@
+var parsePath = require('./lib/parse-path')
+var setValue = require('./lib/set-value')
+
+function appendField (store, key, value) {
+  var steps = parsePath(key)
+
+  steps.reduce(function (context, step) {
+    return setValue(context, step, context[step.key], value)
+  }, store)
+}
+
+module.exports = appendField