try date based tagging

drone.yml

@@ -2,6 +2,10 @@ kind: pipeline
 name: default
 
 steps:
+- name: tag
+    image: node
+    commands:
+      - echo -n "$(date +%Y%m%d_%H%M%S), latest" > .tags
 - name: docker
   image: plugins/docker
   settings:
@@ -11,5 +15,3 @@ steps:
       from_secret: docker_username
     password:
       from_secret: docker_password
-    tags:
-      - latest