Add CI integration with drone

.drone.yml

@@ -0,0 +1,33 @@
+kind: pipeline
+type: docker
+name: default
+
+steps:
+  - name: lint
+    image: golang:latest
+    volumes:
+      - name: deps
+        path: /go
+    commands:
+      - go get -u github.com/golangci/golangci-lint/cmd/golangci-lint
+      - golangci-lint run
+
+  - name: test
+    image: golang
+    volumes:
+      - name: deps
+        path: /go
+    commands:
+      - go test
+
+  - name: build
+    image: golang
+    volumes:
+      - name: deps
+        path: /go
+    commands:
+      - go build
+
+volumes:
+  - name: deps
+    temp: {}