I use Minio https://github.com/minio/minio, though there are others. As someone who never worked with s3 before but wanted to try it and use it with some apps that supported s3 as a storage target, it’s been working fine for me though I’m certainly not using it to its potential. Has web access and all.
I ran minio for a bit, but it became exponentially more complicated the older they got. It went from a selfhosted bucket storage to a enterprise level bucket storage, and hosting it seemed to get really complicated.
Watching this threat to see if anyone has a simple one now