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/lodash/clamp.js

@@ -0,0 +1,39 @@
+var baseClamp = require('./_baseClamp'),
+    toNumber = require('./toNumber');
+
+/**
+ * Clamps `number` within the inclusive `lower` and `upper` bounds.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Number
+ * @param {number} number The number to clamp.
+ * @param {number} [lower] The lower bound.
+ * @param {number} upper The upper bound.
+ * @returns {number} Returns the clamped number.
+ * @example
+ *
+ * _.clamp(-10, -5, 5);
+ * // => -5
+ *
+ * _.clamp(10, -5, 5);
+ * // => 5
+ */
+function clamp(number, lower, upper) {
+  if (upper === undefined) {
+    upper = lower;
+    lower = undefined;
+  }
+  if (upper !== undefined) {
+    upper = toNumber(upper);
+    upper = upper === upper ? upper : 0;
+  }
+  if (lower !== undefined) {
+    lower = toNumber(lower);
+    lower = lower === lower ? lower : 0;
+  }
+  return baseClamp(toNumber(number), lower, upper);
+}
+
+module.exports = clamp;