Disable push when unprotected
Add the DOCKER_PUSH_FROM_UNPROTECTED_DISABLED environment variable to disable docker push when not on a protected branch, by default it is unset, an so the docker template behave exactly as before.
Add the DOCKER_PUSH_FROM_UNPROTECTED_DISABLED environment variable to disable docker push when not on a protected branch, by default it is unset, an so the docker template behave exactly as before.