Add pipeline step 'deploy-staging'

.drone.yml

@@ -11,19 +11,30 @@ steps:
       extended: yes
       validate: yes
 
-  - name: deploy
+  - name: deploy-staging
     image: appleboy/drone-scp
-    settings:
+    settings: &settings
       host: dragon.luj0ga.de
       username: www
       key:
         from_secret: ssh_key
       passphrase:
         from_secret: ssh_passphrase
-      target: /srv/www/sites/www.franconian.net/
+      target: /srv/www/sites/staging.www.franconian.net/
       source: public/*
       strip_components: 1
       rm: yes
+    when:
+      event:
+        - push
+      branch:
+        - staging
+
+  - name: deploy
+    image: appleboy/drone-scp
+    settings:
+      <<: *settings
+      target: /srv/www/sites/www.franconian.net/
     when:
       event:
         - push