+permettre temps par question : gestion côté serveur, y réfléchir...
auto grading + finish erdiag + corr tp1
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// --> 2 sockets on monitoring page: one with ns "/" et one dedicated to the exam, triggered after the first
// --> The monitoring page should not be closed during exam (otherwise monitors won't receive any more data)
+// TOOD need to re-introduce disconnections count + time (showed in monitoring and stored
+
function examRoom(socket) {
let students = { };
const aid = ObjectId(socket.handshake.query.aid);