use correct regex for the reverse proxy

deb/OpenMediaCenter/etc/nginx/sites-available/OpenMediaCenter.conf

@@ -13,7 +13,7 @@ server {
         try_files $uri /index.html;
     }
 
-    location /api/ {
+    location ~* ^/(api/|token) {
         proxy_pass http://127.0.0.1:8081;
     }
 }