Use cache, build for every push

.drone.yml

@@ -2,10 +2,6 @@ kind: pipeline
 type: docker
 name: build & publish image
 
-trigger:
-  event:
-  - tag
-
 steps:
 - name: build & publish
   image: plugins/docker
@@ -15,4 +11,10 @@ steps:
       from_secret: zipek_registry_username
     password: 
       from_secret: zipek_registry_password
-    repo: containers.zipek.cz/kamen/graphicek
+    repo: containers.zipek.cz/kamen/graphicek
+    tags: 
+      - "${DRONE_BRANCH}"
+      - "${DRONE_BRANCH}-${DRONE_COMMIT}"
+    cache_from:
+      - "containers.zipek.cz/kamen/graphicek:master"
+      - "containers.zipek.cz/kamen/graphicek:${DRONE_BRANCH}"