Hi @timfish,
Great idea, thanks for the #feature-request!
We’d be glad to add auto detection support for Electron apps, but right now we’re a bit occupied with other tasks.
If you can help us a bit that could speed up the process. It’d help a lot if you could share a #how-to about how an Electron app can be configured, with a bitrise.yml config and inputs to set / things to search for. I shared a bit more about this here, in a similar request: Nativescript Support on bitrise.io
Once we have a #how-to we can help with adding the auto detection code, either guiding you to do it yourself if you have the time, or we can just implement it the way the #how-to describes.
If you have any questions or if we can help with anything just let us know! 
P.S.: don’t forget to vote on this #feature-request! 