Initialisation

Added the packages and files for the backend server

node_modules/graphql/jsutils/promiseReduce.d.ts

@@ -0,0 +1,13 @@
+import type { PromiseOrValue } from './PromiseOrValue';
+/**
+ * Similar to Array.prototype.reduce(), however the reducing callback may return
+ * a Promise, in which case reduction will continue after each promise resolves.
+ *
+ * If the callback does not return a Promise, then this function will also not
+ * return a Promise.
+ */
+export declare function promiseReduce<T, U>(
+  values: Iterable<T>,
+  callbackFn: (accumulator: U, currentValue: T) => PromiseOrValue<U>,
+  initialValue: PromiseOrValue<U>,
+): PromiseOrValue<U>;