Docker - Docker mod for all images

This mod adds docker and docker-compose binaries to any linuxserver image.

IMPORTANT NOTE: For docker access inside a container, a volume mapping needs to be added for /var/run/docker.sock:/var/run/docker.sock in the container's docker run/create/compose. If you'd like to connect to a remote docker service instead, you don't have to map the docker sock; you can either set an env var for DOCKER_HOST=remoteaddress or use the docker cli option -H.

In the container's docker arguments, set an environment variable DOCKER_MODS=linuxserver/mods:universal-docker to enable.

If adding multiple mods, enter them in an array separated by |, such as DOCKER_MODS=linuxserver/mods:universal-docker|linuxserver/mods:universal-mod2