Fix mock schema and move mock injections out of index.js

server/debug/injectMockData.js

@@ -0,0 +1,11 @@
+import User from "../models/User.js";
+import Post from "../models/Post.js";
+import { mockUsers, mockPosts } from "../data/mock.js";
+
+const injectMockData = async () => {
+  /* Inject mock data - DO NOT USE IN PRODUCTION */
+  User.insertMany(mockUsers).then(() => console.log("Mock users injected"));
+  Post.insertMany(mockPosts).then(() => console.log("Mock posts injected"));
+};
+
+export default injectMockData;