Update .drone.yml

.drone.yml

@@ -1,6 +1,14 @@
+workspace:
+  base: /go
+  path: src/github.com/drone-demos/drone-with-go
+
 pipeline:
-  build:
+  test:
-    image: golang:1.5
+    image: golang:latest
     commands:
       - go vet
       - go test -v -cover
+  build:
+    image: golang:latest
+    commands:
+      - go build