added automated testing with drone

.drone.yaml

@@ -0,0 +1,14 @@
+kind: pipeline
+type: kubernetes
+name: default
+steps:
+  - name: test
+    image: golang:alpine
+    commands:
+      - go build
+      - go test
+trigger:
+  branch:
+    - master
+  event:
+    - push