Merge pull request #10 from drpebcak/drone-build

Follow conventions

Author: cloudnautique

.drone.yml

@@ -26,14 +26,12 @@ steps:
     password:
       from_secret: docker_password
     repo: rancher/rdns-server
-    tag: "${DRONE_COMMIT}-rancher-amd64"
+    tag: "${DRONE_TAG}-rancher-amd64"
     username:
       from_secret: docker_username
   when:
     event:
-    - push
-    branch:
-    - master
+    - tag
 
 volumes:
 - name: socket