fix(api): fix api endpoint logic #5

chore(env): obscure api url in env

feat(ui): render subjects according to user preparation unit

app/exam/pretest/page.tsx

@@ -32,7 +32,6 @@ function PretestPageContent() {
   const [metadata, setMetadata] = useState<Metadata | null>(null);
   const [loading, setLoading] = useState(true);
   const [error, setError] = useState<string>();
-  console.log(loading);
 
   useEffect(() => {
     async function fetchQuestions() {