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/validator/lib/isBIC.js

@@ -0,0 +1,24 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = isBIC;
+var _assertString = _interopRequireDefault(require("./util/assertString"));
+var _isISO31661Alpha = require("./isISO31661Alpha2");
+function _interopRequireDefault(e) { return e && e.__esModule ? e : { default: e }; }
+// https://en.wikipedia.org/wiki/ISO_9362
+var isBICReg = /^[A-Za-z]{6}[A-Za-z0-9]{2}([A-Za-z0-9]{3})?$/;
+function isBIC(str) {
+  (0, _assertString.default)(str);
+
+  // toUpperCase() should be removed when a new major version goes out that changes
+  // the regex to [A-Z] (per the spec).
+  var countryCode = str.slice(4, 6).toUpperCase();
+  if (!_isISO31661Alpha.CountryCodes.has(countryCode) && countryCode !== 'XK') {
+    return false;
+  }
+  return isBICReg.test(str);
+}
+module.exports = exports.default;
+module.exports.default = exports.default;