Initialisation

Added the packages and files for the backend server

node_modules/graphql/jsutils/instanceOf.d.ts

@@ -0,0 +1,16 @@
+/**
+ * A replacement for instanceof which includes an error warning when multi-realm
+ * constructors are detected.
+ * See: https://expressjs.com/en/advanced/best-practice-performance.html#set-node_env-to-production
+ * See: https://webpack.js.org/guides/production/
+ */
+export declare const instanceOf: (
+  value: unknown,
+  constructor: Constructor,
+) => boolean;
+interface Constructor extends Function {
+  prototype: {
+    [Symbol.toStringTag]: string;
+  };
+}
+export {};