I am unsure if I understand you correctly. Funkwhale is for you to publish music or other audio you make yourself. Not for your commercial music library. And the software itself is under the GNU AGPLv3. You can host the software yourself on your own server or you join an instance of someone else. Just like lemmy, mastodon or all the other fediverse projects.
There is a whole field, that looks a bit like religion to me, about how to test right.
I can tell you from experience that testing is a tool that can give confidence. There are a few new tools that can help. Mutation testing is one I know that can find bad tests.
Integration tests can help find the most egregious errors that make your application crash.
Not every getter needs a test but using unit tests while developing a feature can even save time because you don’t have to start the app and get to the point where the change happens and test by hand.
A review can find some errors but human brains are not compilers it is hard to miss errors and the more you add to a review the easier it can get lost. The reviews can mostly help make sure that the code is more in line with the times style and that more than one person knows about the changes.
You can’t find all mistakes all the time. That’s why it is very important to have a strategy to avert the worse and revert errors. If you develop a web app: backups, rolling deployments, revert procedures. And make sure everyone know how and try it at least once. These procedures can fail. Refine them trough failure.
That is my experience from working in the field for a while. No tests is bad. Too many tests is a hassle. There will always be errors. Be prepared.
Piwigo has an S3 extension https://piwigo.org/ext/extension_view.php?eid=691
I agree that is sucks but my advice is purely practical. I try to be principled where I can but email is a lost cause in my opinion. I have hosted my own Mailserver. I encountered providers that only have allow lists and needed me to manually apply to allow my mail in. You have to build a reputation to not be marked as spam. Someone can just submit your domain to a block list and you have to find out how to get removed. It is a mess.
The cold hard truth is that if you want your mail delivered reliably, don’t host yourself.
Fun is very subjective so I just want to give an opposing opinion. I really enjoyed the game and its portrayal of mental illness and trauma. The story can be confusing but I really enjoyed the overall arc. So keep it on your list because you should experience the game yourself to form you own opinion.
I really like that the https://www.ntppool.org project exists for that purpose now.
Depending on your jurisdiction it is probably your responsibility to enforce your copyright. I can always just record your music off a streaming platform. You can attach a license to your song in funkwhale (see this). If you want DRM for your music then funkwhale is probably also not for your. You still have to enforce your self that nobody monetizes your works if you don’t allow it. You can delete things from the fediverse if you know the source but I don’t think funkwhale allows DRM protected music.
If you attach a license to your works that doesn’t allow monetization and they monetize the app you can sue them. I doubt they will though. And they probably wouldn’t be very successful because the app and the server are open source. You could just build the app without monetization. And someone probably would.
The upload and sharing copyrighted music probably falls into the hands of the instance admin. As with PeerTube it is probably not a good idea to have open signups. But everyone has to make sure that doesn’t happen.
The fediverse is an open and very liberal space. If you want full control over your works it is probably not for you. No software with federation probably is. If you want and need to control over your works (which is legitimate) you need something with a tighter grip, maybe host the things yourself on your server with DRM. That doesn’t mean it is bad for everyone.