Make pipeline more useful

.drone.yml

@@ -4,8 +4,6 @@ type: docker
 name: build and publish
 
 trigger:
-    branch:
-        - master
     event:
         include:
             - push
@@ -18,23 +16,23 @@ steps:
           CREATED: ${DRONE_BUILD_CREATED}
           SOURCE_URL: ${DRONE_GIT_HTTP_URL}
       settings:
+          dry_run: true
           purge: true
-          username:
-              from_secret: dockerhub_user
-          password:
-              from_secret: dockerhub_key
           repo: varakh/hetzner-storagebox-exporter
           tags:
-              - latest
+              - ${DRONE_COMMIT_SHA}
 
 ---
 kind: pipeline
 type: docker
-name: monthly build and publish
+name: build and publish
 
 trigger:
     event:
         - cron
+        - promote
+    target:
+        - production
     cron:
         include:
             - monthly
@@ -54,4 +52,30 @@ steps:
               from_secret: dockerhub_key
           repo: varakh/hetzner-storagebox-exporter
           tags:
-              - monthly
+              - latest
+      when:
+          branch:
+              - master
+
+---
+kind: pipeline
+type: docker
+name: result
+
+steps:
+    - name: notify
+      image: drillster/drone-email
+      settings:
+          subject: "Build failed"
+          body: "URL ${DRONE_BUILD_LINK}"
+          host:
+              from_secret: mail_host
+          username:
+              from_secret: mail_user
+          password:
+              from_secret: mail_password
+          from:
+              from_secret: mail_from
+      when:
+          status:
+              - failure