Initialisation

Added the packages and files for the backend server

node_modules/graphql/jsutils/printPathArray.mjs

@@ -0,0 +1,10 @@
+/**
+ * Build a string describing the path.
+ */
+export function printPathArray(path) {
+  return path
+    .map((key) =>
+      typeof key === 'number' ? '[' + key.toString() + ']' : '.' + key,
+    )
+    .join('');
+}