replaced chown with find -not -user -execdir chown

[woodmichl]

chown -R tries to chown all files. find -not -user -execdir only chowns files not owned by PUID.
This should fix #2991 especially on high io delay systems

[nginxproxymanagerci]

Docker Image for build 1 is available on DockerHub as jc21/nginx-proxy-manager:github-pr-3617

Note: ensure you backup your NPM instance before testing this PR image! Especially if this PR contains database changes.

[woodmichl]

This makes a huge difference with high io delay systems.
NPM started with the old image:

docker logs nginx-proxy-manager-app-1 --timestamps -f
2024-03-10T01:43:48.531315056Z ❯ Configuring npm user ...
2024-03-10T01:44:18.626856722Z useradd warning: npm's uid 0 outside of the UID_MIN 1000 and UID_MAX 60000 range.
2024-03-10T01:44:38.243063441Z ❯ Configuring npm group ...
2024-03-10T01:44:39.602130055Z ❯ Checking paths ...
2024-03-10T01:44:44.379702258Z ❯ Setting ownership ...
2024-03-10T03:51:50.463062606Z ❯ Dynamic resolvers ...

vs NPM started with jc21/nginx-proxy-manager:github-pr-3617:

docker logs nginx-proxy-manager-app-1 --timestamps -f
2024-03-10T01:36:30.059597735Z ❯ Configuring npm user ...
2024-03-10T01:37:02.683703437Z useradd warning: npm's uid 0 outside of the UID_MIN 1000 and UID_MAX 60000 range.
2024-03-10T01:37:28.858989680Z ❯ Configuring npm group ...
2024-03-10T01:37:30.962162157Z ❯ Checking paths ...
2024-03-10T01:37:37.305240596Z ❯ Setting ownership ...
2024-03-10T01:39:08.974547120Z ❯ Dynamic resolvers ...
2024-03-10T01:39:08.983700932Z ❯ IPv6 ...

So as you can see with the new code the "Setting ownership" step took ~1 Minute and 30 seconds while taking >2 hours with the old code

[jc21]

Great stuff :)