ci: dry-run on push+publish to immawanderer

.drone.yml

@@ -86,8 +86,7 @@ steps:
     repo: plugins/docker
     tags: linux-amd64
   when:
-    event:
-    - pull_request
+    event: [push, pull_request]
 
 - name: publish
   image: plugins/docker:18
@@ -96,9 +95,13 @@ steps:
     auto_tag_suffix: linux-amd64
     daemon_off: false
     dockerfile: docker/docker/Dockerfile.linux.amd64
+    password:
+      from_secret: docker_password
     repo: immawanderer/drone-docker
-    dry_run: true
+    username:
+      from_secret: docker_username
   when:
+    branch: [edge-dind]
     event:
       exclude:
       - pull_request