Add new build step and disable arm (for now)

.drone.yml

@@ -1,6 +1,10 @@
 platform: ${platform}
 
 pipeline:
+  build:
+    image: golang
+    commands:
+      - make build
   build:
     image: plugins/docker:${docker_tag}
     repo: iamthefij/dockron
@@ -14,5 +18,5 @@ matrix:
   include:
     - platform: linux/amd64
       docker_tag: latest
-    - platform: linux/arm
-      docker_tag: linux-arm
+    # - platform: linux/arm
+    #   docker_tag: linux-arm