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/isDataURI.js

@@ -0,0 +1,40 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = isDataURI;
+var _assertString = _interopRequireDefault(require("./util/assertString"));
+function _interopRequireDefault(e) { return e && e.__esModule ? e : { default: e }; }
+var validMediaType = /^[a-z]+\/[a-z0-9\-\+\._]+$/i;
+var validAttribute = /^[a-z\-]+=[a-z0-9\-]+$/i;
+var validData = /^[a-z0-9!\$&'\(\)\*\+,;=\-\._~:@\/\?%\s]*$/i;
+function isDataURI(str) {
+  (0, _assertString.default)(str);
+  var data = str.split(',');
+  if (data.length < 2) {
+    return false;
+  }
+  var attributes = data.shift().trim().split(';');
+  var schemeAndMediaType = attributes.shift();
+  if (schemeAndMediaType.slice(0, 5) !== 'data:') {
+    return false;
+  }
+  var mediaType = schemeAndMediaType.slice(5);
+  if (mediaType !== '' && !validMediaType.test(mediaType)) {
+    return false;
+  }
+  for (var i = 0; i < attributes.length; i++) {
+    if (!(i === attributes.length - 1 && attributes[i].toLowerCase() === 'base64') && !validAttribute.test(attributes[i])) {
+      return false;
+    }
+  }
+  for (var _i = 0; _i < data.length; _i++) {
+    if (!validData.test(data[_i])) {
+      return false;
+    }
+  }
+  return true;
+}
+module.exports = exports.default;
+module.exports.default = exports.default;