Add build steps but no publish

.drone.yml

@@ -1,9 +1,14 @@
 platform: ${platform}
 
 pipeline:
+  build:
+    image: golang:1.10
+    commands:
+      - go get -u github.com/golang/dep/cmd/dep
+      - make build
   publish:
     image: plugins/docker:${docker_tag}
-    repo: iamthefij/dockron
+    # repo: iamthefij/dockron
     secrets:
       - docker_username
       - docker_password