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/express-validator/lib/field-selection.d.ts

@@ -0,0 +1,22 @@
+import { FieldInstance, Location, Request, UnknownFieldInstance } from './base';
+export type SelectFields = (req: Request, fields: string[], locations: Location[]) => FieldInstance[];
+export declare const selectFields: SelectFields;
+export declare const selectUnknownFields: (req: Request, knownFields: string[], locations: Location[]) => UnknownFieldInstance[];
+/**
+ * Reconstructs a field path from a list of path segments.
+ *
+ * Most segments will be concatenated by a dot, for example `['foo', 'bar']` becomes `foo.bar`.
+ * However, a numeric segment will be wrapped in brackets to match regular JS array syntax:
+ *
+ * ```
+ * reconstructFieldPath(['foo', 0, 'bar']) // foo[0].bar
+ * ```
+ *
+ * Segments which have a special character such as `.` will be wrapped in brackets and quotes,
+ * which also matches JS syntax for objects with such keys.
+ *
+ * ```
+ * reconstructFieldPath(['foo', 'bar.baz', 'qux']) // foo["bar.baz"].qux
+ * ```
+ */
+export declare function reconstructFieldPath(segments: readonly string[]): string;