[add] drone config

.drone.yml

@@ -0,0 +1,13 @@
+kind: pipeline
+type: kubernetes
+name: default
+
+steps:
+  - name: generate_tags
+    image: node
+    commands:
+      - echo -n "${DRONE_BRANCH}-$(date +'%Y%m%d%H%M%S')-${DRONE_COMMIT:0:10}, latest" > .tags
+  - name: unit test
+    image: golang
+    commands:
+      - make tests_unit

Makefile

@@ -29,6 +29,5 @@ docker_build_release_latest:
 tests_integration:
 	go test -v -tags=integration -coverpkg=./... ./metadata
 
-
 tests_unit:
 	SET_TEST=set_val go test -v -coverpkg=./... ./...