Fix.

app.js

@@ -10,6 +10,7 @@
  *
  *  SYZOJ is distributed in the hope that it will be useful,
  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  *  GNU Affero General Public License for more details.
  *
  *  You should have received a copy of the GNU Affero General Public