Separate monthly build from latest

.drone.yml

@@ -4,13 +4,11 @@ type: docker
 name: build and publish
 
 trigger:
+    branch:
+        - master
     event:
         include:
             - push
-            - cron
-    cron:
-    - monthly
-
 
 steps:
     - name: docker build and publish
@@ -28,3 +26,32 @@ steps:
           repo: varakh/hetzner-storagebox-exporter
           tags:
               - latest
+
+---
+kind: pipeline
+type: docker
+name: monthly build and publish
+
+trigger:
+    event:
+        - cron
+    cron:
+        include:
+            - monthly
+
+steps:
+    - name: docker build and publish
+      image: plugins/docker
+      environment:
+          REVISION: ${DRONE_COMMIT_SHA}
+          CREATED: ${DRONE_BUILD_CREATED}
+          SOURCE_URL: ${DRONE_GIT_HTTP_URL}
+      settings:
+          purge: true
+          username:
+              from_secret: dockerhub_user
+          password:
+              from_secret: dockerhub_key
+          repo: varakh/hetzner-storagebox-exporter
+          tags:
+              - monthly