What's the recommended way to add applications to this distribution like Exodus while maintaining the integrity and not having to install the app every time you boot up ?
As far as I can tell, the only way to add applications is to download the bitkey source code, add them in yourself... and then compile it all
https://github.com/bitkey/bitkeyYou can see how "Electrum" is installed here:
https://github.com/bitkey/bitkey/blob/master/conf.d/electrumBasically, you'd just need to figure out how to add in the application installer, any required/missing dependencies, calculate all the appropriate checksums etc and then build the image. Not sure that this will qualify as "maintaining the integrity" tho