Initialisation

Added the packages and files for the backend server

node_modules/graphql/jsutils/instanceOf.mjs

@@ -0,0 +1,57 @@
+import { inspect } from './inspect.mjs';
+/* c8 ignore next 3 */
+
+const isProduction =
+  globalThis.process && // eslint-disable-next-line no-undef
+  process.env.NODE_ENV === 'production';
+/**
+ * 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 const instanceOf =
+  /* c8 ignore next 6 */
+  // FIXME: https://github.com/graphql/graphql-js/issues/2317
+  isProduction
+    ? function instanceOf(value, constructor) {
+        return value instanceof constructor;
+      }
+    : function instanceOf(value, constructor) {
+        if (value instanceof constructor) {
+          return true;
+        }
+
+        if (typeof value === 'object' && value !== null) {
+          var _value$constructor;
+
+          // Prefer Symbol.toStringTag since it is immune to minification.
+          const className = constructor.prototype[Symbol.toStringTag];
+          const valueClassName = // We still need to support constructor's name to detect conflicts with older versions of this library.
+            Symbol.toStringTag in value // @ts-expect-error TS bug see, https://github.com/microsoft/TypeScript/issues/38009
+              ? value[Symbol.toStringTag]
+              : (_value$constructor = value.constructor) === null ||
+                _value$constructor === void 0
+              ? void 0
+              : _value$constructor.name;
+
+          if (className === valueClassName) {
+            const stringifiedValue = inspect(value);
+            throw new Error(`Cannot use ${className} "${stringifiedValue}" from another module or realm.
+
+Ensure that there is only one instance of "graphql" in the node_modules
+directory. If different versions of "graphql" are the dependencies of other
+relied on modules, use "resolutions" to ensure only one version is installed.
+
+https://yarnpkg.com/en/docs/selective-version-resolutions
+
+Duplicate "graphql" modules cannot be used at the same time since different
+versions may have different capabilities and behavior. The data from one
+version used in the function from another could produce confusing and
+spurious results.`);
+          }
+        }
+
+        return false;
+      };