* Provide version information through labels
Can be retrieved by calling e.g. `docker inspect -f {{.Config.Labels}} tvial/docker-mailserver:testing`
Signed-off-by: Felix Bartels <felix@host-consultants.de>
* add build hook so that Docker Hub can work with the build args
Signed-off-by: Felix Bartels <felix@host-consultants.de>
* remove obsolete build-no-cache
build args invalidate build cache already
Signed-off-by: Felix Bartels <felix@host-consultants.de>
* adapt travis file
Signed-off-by: Felix Bartels <felix@host-consultants.de>
* shellcheck
Signed-off-by: Felix Bartels <felix@host-consultants.de>
