added drone file

.drone.yml

@@ -0,0 +1,17 @@
+kind: pipeline
+type: docker
+name: default
+
+steps:
+- name: docker
+  image: plugins/docker
+  settings:
+    repo: docker.kapelle.org/ncpb
+    registry: docker.kapelle.org
+  when:
+    branch:
+    - master
+
+trigger:
+  branch:
+  - master