Initialisation

Added the packages and files for the backend server

node_modules/graphql/jsutils/isPromise.mjs

@@ -0,0 +1,10 @@
+/**
+ * Returns true if the value acts like a Promise, i.e. has a "then" function,
+ * otherwise returns false.
+ */
+export function isPromise(value) {
+  return (
+    typeof (value === null || value === void 0 ? void 0 : value.then) ===
+    'function'
+  );
+}