Update .drone.yml

.drone.yml

@@ -36,24 +36,18 @@ steps:
 
   - name: build
     image: lorisleiva/laravel-docker
-    environment:
-      BUILD_VERSION: "1.0.1-pre"
     commands:
       - composer global require humbug/box
-      - echo php backupper app:build --build-version=$BUILD_VERSION -n >> build.sh
-      - chmod +x ./build.sh
-      - ./build.sh
+      - php backupper app:build --build-version=$(git describe --abbrev=0 --tags) -n
       - php builds/backupper
 
   - name: publish
     image: plugins/github-release
-    environment:
-      BUILD_VERSION: "1.0.1-pre"
     settings:
       api_key:
         from_secret: api_key
       files:
         - builds/*
-      title: $BUILD_VERSION
+      prerelease: true
     when:
       event: tag