fix: remove docker compose version

Several updates (#7)

* feat: add php 8.3
* fix: remove php 8.0
* fix: rename php 8.2 label
* build: update traefik
* docs: update versions

chore: bump traefik version up

Merge pull request #5 from tbreuss/feat-examples

docs: update versions

Merge pull request #4 from tbreuss/feat-examples

- feat: add PHP 8.2 example, remove PHP 7.4
- docs: update versions, adjust content slightly

Merge pull request #3 from tbreuss/tbreuss-patch-1

fix: use minor versions consequently

Add mailhog