prevent staging build leaking commits to prod

.drone.yml

@@ -22,12 +22,16 @@ steps:
   image: aaronriedel/kustomize-ci
   commands:
     - cd /deployment-repo
+    - git clone https://git.ar21.de/yolokube/core-deployments.git .
+    - cd /staging-repo
     - git clone -b $DRONE_BRANCH https://git.ar21.de/yolokube/core-deployments.git .
-    - cd /deployment-repo/dashboard/overlays/staging
+    - cd /staging-repo/dashboard/overlays/staging
     - kustomize build -o /deployment-repo/dashboard/staging/dashboard.yaml
   volumes:
   - name: deployment-repo
     path: /deployment-repo
+  - name: staging-repo
+    path: /staging-repo
   when:
     branch:
       exclude:
@@ -76,6 +80,8 @@ steps:
 volumes:
 - name: deployment-repo
   temp: {}
+- name: staging-repo
+  temp: {}
 when:
   event:
     exclude: