Install Kamailio On Docker

Due to Docker Hub restrictions we migrated to Github Packages Registry.

The ghcr.io/kamailio/kamailio docker image is using Debian. If you are familiar with Debian, then this image may be a choice to start with and extend.

The ghcr.io/kamailio/kamailio-ci docker image is using Alpine. Alpine allows to create smaller and secure docker images.

Kamailio images can be seen at:

• https://github.com/kamailio/kamailio-docker/pkgs/container/kamailio/versions
• https://github.com/kamailio/kamailio-ci/pkgs/container/kamailio-ci/versions