My prefs for BE would be: Laravel > Node = Homebrew PHP framework > Other (like Py/Flask)
edit: For now, people who want to collaborate: please DM me your GitHub username on here or through Discord, and I’ll give you access to the organization.
My preference for this project is Laravel, serves as a nice entry point and provides functionality that keeps development focused less on trivial issues and more so on the PBBG feature set. If not, I think that something in the PHP ecosystem would still be well suited - it’s accessible and easy for outsiders to get into.