Feature Request: Support environment variable for version

[derekmurawsky]

Expected Behavior

Set a DOCKER_COMPOSE_VERSION environment variable and have the run script use it.
If the environment variable doesn't exist, have it default to latest.

Current Behavior

In order to change versions you have to edit the run script itself.

Thoughts

Keeping config in the environment is a normal and accepted pattern. Having version pinning is also a normal/desired feature from a CICD perspective. Having to edit the script to run docker-compose in a specific version seems like an anti-pattern.

It think this change is as easy as changing

VERSION="latest" # can be set to a specific version tag from docker hub, such as "1.25.5", or "alpine"
IMAGE="linuxserver/docker-compose:$VERSION"

to

DOCKER_COMPOSE_VERSION:="latest" # can be set to a specific version tag from docker hub, such as "1.25.5", or "alpine"
IMAGE="linuxserver/docker-compose:$DOCKER_COMPOSE_VERSION"

I would be happy to put in a PR if this is something others would like. Perhaps a different Variable name to prevent confusion between the docker version and the container version?

[aptalca]

To clarify, it is not referring to docker compose version, it is referring to docker image tag, which you can find listed here: https://hub.docker.com/r/linuxserver/docker-compose/tags

Defaulting it to latest if unset is fine. Feel free to open a PR