I used Apache's webdav server for years for this kind of thing.
https://httpd.apache.org/docs/2.4/mod/mod_dav.html
Caddy also has webdav support:
A place to share alternatives to popular online services that can be self-hosted without giving up privacy or locking you into a service you don't control.
For Example
We welcome posts that include suggestions for good self-hosted alternatives to popular online services, how they are better, or how they give back control of your data. Also include hints and tips for less technical readers.
Useful Lists
I used Apache's webdav server for years for this kind of thing.
https://httpd.apache.org/docs/2.4/mod/mod_dav.html
Caddy also has webdav support:
Sorry😆, installed Docker WITHOUT any issues
What year is your old Mac mini?, I upgraded my 2012 mini with open core legacy patcher to run Ventura, and it’s faster now and I installed the latest version of docker with any issues.