Use in-cluster ServiceAccount auth for deployments

.woodpecker.yml

@@ -23,13 +23,10 @@ steps:
 
   - name: deploy
     image: bitnami/kubectl:latest
+    backend_options:
+      kubernetes:
+        serviceAccountName: woodpecker-deploy
     commands:
-      - mkdir -p ~/.kube
-      - printf '%s\n' "$KUBECONFIG_CONTENT" > ~/.kube/config
-      - chmod 600 ~/.kube/config
       - kubectl apply -f k8s.yaml -n blog
       - kubectl rollout restart deployment/blog-dep -n blog
       - kubectl rollout status deployment/blog-dep -n blog
-    environment:
-      KUBECONFIG_CONTENT:
-        from_secret: kubeconfig