Initialisation

Added the packages and files for the backend server

node_modules/graphql/jsutils/keyValMap.d.ts

@@ -0,0 +1,23 @@
+import type { ObjMap } from './ObjMap';
+/**
+ * Creates a keyed JS object from an array, given a function to produce the keys
+ * and a function to produce the values from each item in the array.
+ * ```ts
+ * const phoneBook = [
+ *   { name: 'Jon', num: '555-1234' },
+ *   { name: 'Jenny', num: '867-5309' }
+ * ]
+ *
+ * // { Jon: '555-1234', Jenny: '867-5309' }
+ * const phonesByName = keyValMap(
+ *   phoneBook,
+ *   entry => entry.name,
+ *   entry => entry.num
+ * )
+ * ```
+ */
+export declare function keyValMap<T, V>(
+  list: ReadonlyArray<T>,
+  keyFn: (item: T) => string,
+  valFn: (item: T) => V,
+): ObjMap<V>;