docs: add developer notes about rootless docker setup

[R-Rudolf]

Based on the earlier developer setup guide, after executing make dev, permission problems can occur in the web service, like the following:

immich_web               | failed to load config from /usr/src/app/vite.config.js
immich_web               | error when starting dev server:
immich_web               | Error: EACCES: permission denied, open '/usr/src/app/vite.config.js.timestamp-1727939078397-b40dceb29345c.mjs'

This is expected when using rootless docker, see moby/moby#45919.
In this PR the developer guide is extended with notes to mitigate the problem, and comments are added to the dev composer file as well.

[alextran1502]

Can you help with formatting the docs with npm run format:fix?

[R-Rudolf]

Ohh, sorry I mistakenly closed the PR and now I do not have the permission to re-open it.

For a minute I thought close means merge. I am used to other repository platform.

Pleae help re-open, and as I understand only a final review is missing from the maintainer.

[danieldietzler]

Ohh, sorry I mistakenly closed the PR and now I do not have the permission to re-open it.

For a minute I thought close means merge. I am used to other repository platform.

Pleae help re-open, and as I understand only a final review is missing from the maintainer.

FYI you cannot just merge PRs lol

[zackpollard]

Hey @R-Rudolf, happy to get these changes merged in, but could you please remove the formatting changes mentioned above and make sure you're still happy with the changes? Also if you could fix the merge conflicts, that'd be great!