do not introspect the value of accessRestriction

if there are no users or groups, it simply means nobody can access it.
(maybe the admin is doing something on the cloudron and does not want
anyone to access it).

src/nginx.js

@@ -30,8 +30,7 @@ function requiresOAuthProxy(app) {
     if (tmp === null) return false;
     if (app.manifest.addons['ldap'] || app.manifest.addons['oauth'] || app.manifest.addons['simpleauth']) return false;
 
-    // check if any restrictions are set
-    return !!((tmp.users && tmp.users.length) || (tmp.groups && tmp.groups.length));
+    return true;
 }
 
 function configureAdmin(certFilePath, keyFilePath, callback) {