fix: append to track body in /end too, and save new track in /add

routes/api/tracks.js

@@ -184,6 +184,9 @@ router.post(
     track.trackData = trackData._id;
     track.author = user;
 
+    await track.save()
+    await trackData.save();
+
     // remember which is the actively building track for this user
     currentTracks.set(user.id, track._id);
 
@@ -240,6 +243,9 @@ router.post(
       throw new Error('current user active track is gone, retry upload');
     }
 
+    track.body += req.body.track.body;
+    await track.save();
+
     const trackData = await TrackData.findById(track.trackData);
     trackData.points = Array.from(parseTrackPoints(track.body));
     await trackData.save();