Add REST route for account setup

This replaces the server side rendered form

src/server.js

@@ -141,6 +141,7 @@ function initializeExpressSync() {
     router.get ('/api/v1/cloudron/logout', routes.cloudron.logout); // this will invalidate the token if any and redirect to /login.html always
     router.post('/api/v1/cloudron/password_reset_request', routes.cloudron.passwordResetRequest);
     router.post('/api/v1/cloudron/password_reset', routes.cloudron.passwordReset);
+    router.post('/api/v1/cloudron/setup_account', routes.cloudron.setupAccount);
 
     // developer routes
     router.post('/api/v1/developer/login', routes.developer.login);