Rename steps and add tree step

.drone.yml

@@ -11,18 +11,24 @@ trigger:
             - pull_request
 
 steps:
-    - name: Update submodules
+    - name: submodules
       image: alpine/git
       commands:
           - git submodule update --init --recursive
 
-    - name: Build site
+    - name: build
       image: mapitman/docker-hugo
       commands:
           - hugo version
           - hugo --minify
 
-    - name: Upload files
+    - name: tree
+      image: alpine:latest
+      commands:
+          - apk add tree
+          - tree -a public/
+
+    - name: upload
       image: appleboy/drone-scp
       settings:
           host: bbaovanc.com