speed up artifact upload

Author: nicolaskruchten

.circleci/config.yml

@@ -65,7 +65,12 @@ jobs:
               git add *
               git commit -m build
               git push --force [email protected]:plotly/plotly.py-docs.git master:built
+              rm -rf .git
+              cd ../..
             fi
+            tar -zcf build/html.tgz build/html
+            rm -rf build/html build/ipynb
+
 
       - store_artifacts:
           path: build