It would help a great deal if you format your posts according: How to format your forum posts - #2 by zavertis
I scrolled up and didn’t notice/remember that you already pasted the compose file content. I was looking for a code block. I forgot that I saw it earlier.
Well if the owner is 101:101 for the folder and files in websites, then it should have worked. Unless of course there is another oddity at work like a special ACL implementation (e.g. on a Synology NAS).
Are you by any chance running your containers on a Synology NAS?