Drone: only rollout docs on tag

.drone.yml

@@ -13,6 +13,8 @@ services:
     privileged: true
     environment:
       DOCKER_TLS_CERTDIR: ""
+    when:
+      event: tag
 
 steps:
   - name: typedoc build
@@ -33,12 +35,18 @@ steps:
       DOCKER_HOST: tcp://localhost:2375
       DOCKER_REGISTRY:
         from_secret: DOCKER_REGISTRY
+    when:
+      event: tag
+      status: success
 
   - name: k8s rollout
     image: bitnami/kubectl
     commands:
       - cd docs/deploy && kubectl apply -f .
       - kubectl rollout restart -n extollo deployment/docs
+    when:
+      event: tag
+      status: success
 
 ---
 kind: pipeline