DSBAPI by the noim

I have a question about Node.js and npm. I am totally new to Node.js but I want to make a better, responsive web app that can be used on a mobile phone and on PC or larger devices. The app fetches data from the DSB Mobile app using the API provided by the Noim.

He does not really explain a lot in his Documentation. Or I just do not get it because I am new to this stuff. I have made a Use-Case-Diagram that explains my idea of how I want to use and make this web app.

My Use-Case-Diagram:

• As a transparent PNG,
• Or as a PDF file.