✅ Add (hopefully) failing test for image labeling

tests/unit/git_4.bats

@@ -116,3 +116,11 @@ EOF
   echo "status: $status"
   assert_failure
 }
+
+@test "(git) git:from-image labels correctly" {
+  run /bin/bash -c "dokku git:from-image $TEST_APP gliderlabs/logspout:v3.2.14"
+  run /bin/bash -c "docker image inspect dokku/$TEST_APP:latest | grep 'alternate-tags' | grep 'gliderlabs/logspout:v3.2.14'"
+  echo "output: $output"
+  echo "status: $status"
+  assert_success
+}