- Implemented an image attachment to the Writing exercise;

- Made it so the exams are now sorted when going through the history;
- Corrected some little mistakes;

src/pages/api/exam/[module]/index.ts

@@ -1,7 +1,7 @@
 // Next.js API route support: https://nextjs.org/docs/api-routes/introduction
 import type {NextApiRequest, NextApiResponse} from "next";
 import {app} from "@/firebase";
-import {getFirestore, collection, getDocs} from "firebase/firestore";
+import {getFirestore, collection, getDocs, query, where} from "firebase/firestore";
 import {withIronSessionApiRoute} from "iron-session/next";
 import {sessionOptions} from "@/lib/session";
 
@@ -16,8 +16,10 @@ async function handler(req: NextApiRequest, res: NextApiResponse) {
 	}
 
 	const {module} = req.query as {module: string};
+	const moduleRef = collection(db, module);
+	const q = query(moduleRef, where("isDiagnostic", "==", false));
 
-	const snapshot = await getDocs(collection(db, module));
+	const snapshot = await getDocs(q);
 
 	res.status(200).json(
 		snapshot.docs.map((doc) => ({