Option to choose another source page

[Grillo-0]

Currently, you can only access the https://run.codes/ page, but The University Of São Paulo (USP) created its own run codes version https://runcodes.icmc.usp.br/, it would be cool to have an option to choose the source page, instead of the default one.

[Math-42]

I believe that as the original run.codes will die I will change the default to the new run.codes and add an option to be able to add in the configuration file which run codes you want to use.

[Grillo-0]

Great idea!