update readme and add codeowners (#25)

.github/CODEOWNERS

@@ -0,0 +1,8 @@
+# These owners will be the default owners for everything in
+# the repo. Unless a later match takes precedence,
+# these will be requested for review when someone opens a pull request.
+*       @trfore
+
+# The following own any files in the .github directory at the root of the
+# repository and any of its subdirectories.
+.github/  @trfore

README.md

@@ -108,7 +108,7 @@ Inspired by Jeff Geerling's ([@geerlingguy](https://github.com/geerlingguy)), Ce
 [docker-centos9-systemd]: https://github.com/trfore/docker-centos9-systemd/blob/main/Dockerfile
 [docker-debian10-systemd]: https://github.com/trfore/docker-debian10-systemd/blob/main/Dockerfile
 [docker-debian11-systemd]: https://github.com/trfore/docker-debian11-systemd/blob/main/Dockerfile
-[docker-debian12-systemd]: https://github.com/trfore/docker-debian11-systemd/blob/main/Dockerfile
+[docker-debian12-systemd]: https://github.com/trfore/docker-debian12-systemd/blob/main/Dockerfile
 [docker-ubuntu2004-systemd]: https://github.com/trfore/docker-ubuntu2004-systemd/blob/main/Dockerfile
 [docker-ubuntu2204-systemd]: https://github.com/trfore/docker-ubuntu2204-systemd/blob/main/Dockerfile
 [docker-ubuntu2404-systemd]: https://github.com/trfore/docker-ubuntu2404-systemd/blob/main/Dockerfile