Suggestion: "data" directory

[jacklul]

It would be nice to not have to modify files tracked by git to use this, would make updating way better.

Something like this could do the trick: https://github.com/daledavies/jump/compare/main...jacklul:jump-php7.4:patch-1 This will "replicate" Docker's volume mapping behavior, leaving app's files intact. I can PR this if it's ok feature.