attempt 2

Signed-off-by: Christian Richter <crichter@owncloud.com>

.drone.star

@@ -19,7 +19,9 @@ def step(arch):
       "image": "plugins/docker",
       "settings": {
           "dockerfile": "motsognir/Dockerfile",
-          "repo": "dragonchaser/motsognir",
+          "dry_run": "true",
+          "purge":"true",
+          "repo": "dragonchaser/dockerhub-autobuild",
           "tag": "latest-%s" % (arch)
         }
       },