add drone file

.drone.yml

@@ -0,0 +1,18 @@
+---
+kind: pipeline
+type: docker
+name: portainer redeploy
+
+trigger:
+  event:
+  - push
+
+steps:
+  - name: send redeploy
+    image: alpine
+    commands:
+    - apk update && apk add curl
+    - curl -X POST "$PORTAINER_WEBHOOK"
+    environment:
+      PORTAINER_WEBHOOK:
+        from_secret: PORTAINER_WEBHOOK