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/multer/lib/counter.js

@@ -0,0 +1,28 @@
+var EventEmitter = require('events').EventEmitter
+
+function Counter () {
+  EventEmitter.call(this)
+  this.value = 0
+}
+
+Counter.prototype = Object.create(EventEmitter.prototype)
+
+Counter.prototype.increment = function increment () {
+  this.value++
+}
+
+Counter.prototype.decrement = function decrement () {
+  if (--this.value === 0) this.emit('zero')
+}
+
+Counter.prototype.isZero = function isZero () {
+  return (this.value === 0)
+}
+
+Counter.prototype.onceZero = function onceZero (fn) {
+  if (this.isZero()) return fn()
+
+  this.once('zero', fn)
+}
+
+module.exports = Counter