Plugin debugging and libraries information

Good morning guys,
I am writing you because I’m having some problems with plugin development, in particular with the task list web app. Currently I am using Docker with the 7.13 image and Firefox browser.
If I need to load a library in my script, how can I declare the dependency in the web app? Also, as I’m always debugging, is there a way I can see the page reload automatically without having to reload the docker container? Of course then I will have to abandon Docker, but if you guys have some suggestions please let me know!

Thank you in advance for your answers!