What is the BaseUrl Of my c9 MEAN app



I am currently fallowing a video going over the MEAN stack and it uses Yeoman-angular generator.
In the app.js file there is a line he writes


he is using this to connect to the server side rest API we he set up. However he said this should point to my server’s baseurl if I am working on a server. What is cloud9’s baseURL for an app. I have tried the apps name from the tap but it does not work for example.


before we used postman to send directly to the server REST api and we used


to post/put/delete/get from the mongoose database holding the values in that url
Does anyone have any idea what is happening?