fix maybe

.drone.yml

 - name: commit documentation
   image: node:12
   commands:
+  - git config --global user.email "frontwork.me@gmail.com"
+  - git config --global user.name "drone"
   - git add -f docs
   - git commit --allow-empty -m "documented version at ${DRONE_BUILD_CREATED}"
   - git tag ${DRONE_BUILD_CREATED}