update drone.yml

drone.yml

   os: linux
   arch: amd64
 
+# https://readme.drone.io/user-guide/pipeline/
+# https://github.com/drone/drone
 steps:
 - name: build
   image: debian:stable-slim
     - cp -rp html/. dist/var/www/html/gamma/
     - mkdir -p dist/etc/nginx/snippets
     - cp -p config/nginx-datasrc-location.conf dist/etc/nginx/snippets/nginx-datasrc-location.conf
+    - RELEASE=$RELEASE-${TAG}
     - mv dist $RELEASE
     - ls -la $RELEASE
     - find $RELEASE -type f -exec md5sum '{}' \;
     - tar -cJvf release/$RELEASE.tar.xz $RELEASE
     - ls -la release
     - find release -type f -exec md5sum '{}' \;
-    - echo "Build finished."
+    - echo "Build finished successfully."
 
+# http://plugins.drone.io/drone-plugins/drone-gitea-release/
+# https://github.com/drone-plugins/drone-gitea-release
 - name: release
   image: plugins/gitea-release
   when: