new syntax of drone build file

.drone.yml

@@ -1,5 +1,13 @@
-pipeline:
-  buildci:
+kind: pipeline
+name: default
+
+steps:
+- name: fetch
+  image: docker:git
+  commands:
+  - git fetch --tags
+
+- name: buildci
   image: golang
   commands:
     - go get ./...
@@ -9,23 +17,10 @@ pipeline:
   when:
     branch: master
 
-  buildrelease:
+- name: buildrelease
   image: golang
   commands:
     - go get ./...
-      - go build -o dist/PiwigoDirectoryUploader cmd/PiwigoDirectoryUploader/PiwigoDirectoryUploader.go
-    when:
-      event: tag
-
-  publish:
-    image: plugins/github-release
-    settings:
-      api_key:
-        from_secret: github_token
-      files: dist/*
-      checksum:
-      - md5
-      - sha256
-      - sha512
+    - build/build-musl.sh
   when:
     event: tag