fix: respect DOCKER_HOST env var for better container runtime Support #165
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DOCKER_HOST is now respected so the binary could be run again other
runtimes like podman, that exposes a compatible socket based api.
To use it export DOCKER_HOST=unix:///run/user/1000/podman/podman.sock
for running with a non root user.
If DOCKER_HOST is not exported then the default path
/var/run/docker.socket
Signed-off-by: Roy Golan rgolan@redhat.com