Update

drone.yml

 - name: prepare
   image: plugins/docker
   settings:
+    dry_run: true
     registry: reg.unino.de
     insecure: false
     #auth: authtoken
     repo: reg.unino.de/library/debian-devel
     #mirror: registry.hub.docker.com/library/busybox
 
-    dry_run: true
-
-
-    #bip: false
-    #context: /drone
-    #custom_dns:
+    bip: true
+    context: /drone
+    custom_dns: 127.0.0.11
     #storage_driver: aufs # aufs, overlay or vfs
 
     #debug: true