[CD] Correct docker image name

.drone.yml

@@ -64,9 +64,8 @@ name: deploy
 
 steps:
 - name: build image
-  image: docker:stable
+  image: bitnami/kubectl
   environment:
-    DOCKER_HOST: tcp://docker:2375
     KUBE_USERNAME:
       from_secret: kubectl_username
     KUBE_PASSWORD:
@@ -76,7 +75,6 @@ steps:
     KUBE_CA:
       form_secret: kubectl_ca
   commands:
-  - kubectl
   - cat kube/kubeconfig_template.yaml | envsubst > /.kube/config
   - kubectl get pods
   - kubectl get deployments