Add a module which will create notifications for all users when the license is at its expiration period, and terminate the process when the license expires.

static/js/app.js

@@ -913,6 +913,12 @@ quayApp = angular.module('quay', quayDependencies, function($provide, cfpLoading
               return '/user';
             }
           }
+        },
+        'expiring_license': {
+          'level': 'error',
+          'message': 'Your license will expire at: {expires_at} ' +
+            '<br><br>Please contact Quay.io support to purchase a new license.',
+          'page': '/contact/'
         }
       };