fix drone

.drone.yml

@@ -16,8 +16,8 @@ steps:
   - /usr/local/bin/python -m pip install --upgrade pip
   - pip install -U -r ./requirements.txt
   - mkdocs build
-  - cp -r site/ /site
-  - chmod -R 777 /site
+  - cp -r site/ $wiki_folder
+  - chmod -R 777 $wiki_folder
 
 volumes:
 - name: site