How to switch to alpine images ?

[pgera]

I have been using the docker compose files satisfactorily for a while. I noticed that this commit https://github.com/nextcloud/docker/commit/aa5c0c192995e98836fc3c5435119583a78bef62 changes the images to alpine variants and removes the www-data user from nginx.conf. I tried to pull in these changes, but got a bunch of permission errors in the nginx log, presumably due to the difference in www-data ? My questions are:

1. Do I need to pull in these changes ? i.e., Would the original images (and their combination) be maintained for nextcloud ?
2. If it is advisable to change, what is the migration path ? I was reluctant to perturb a working config.