Add files via upload

server/routes/illegalFileType.js

@@ -0,0 +1,7 @@
+async function illegalFileType(req, res) {
+    res.setHeader('Content-Type', 'text/html');
+    res.statusCode = 413;
+    res.render('ERR_FILE_TOO_BIG');
+    res.end();
+}
+module.exports = illegalFileType;