Escape $ in docker-clean target
Escape $ in docker-clean target

Before: https://gist.github.com/leigh-johnson/98331b280b1679bd4c0e4b02f7c59b00
After: Yay!

snahelou/awx,wwitzel3/awx,snahelou/awx,wwitzel3/awx,wwitzel3/awx,snahelou/awx,wwitzel3/awx,snahelou/awx