init drone file (#2)

Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
Reviewed-on: https://gitea.com/gitea/test-env/pulls/2
Reviewed-by: 6543 <6543@obermui.de>
Reviewed-by: Lunny Xiao <xiaolunwen@gmail.com>
Co-authored-by: a1012112796 <1012112796@qq.com>
Co-committed-by: a1012112796 <1012112796@qq.com>

.drone.yml

@@ -0,0 +1,74 @@
+---
+kind: pipeline
+name: linux-amd64
+
+platform:
+  os: linux
+  arch: amd64
+
+trigger:
+  branch:
+  - master
+  event:
+  - push
+
+steps:
+  - name: publish
+    pull: always
+    image: plugins/docker:linux-amd64
+    settings:
+      auto_tag: true
+      auto_tag_suffix: linux-amd64
+      repo: gitea/test_env
+      password:
+        from_secret: docker_password
+      username:
+        from_secret: docker_username
+
+---
+kind: pipeline
+name: linux-arm64
+
+platform:
+  os: linux
+  arch: arm64
+
+trigger:
+  branch:
+  - master
+  event:
+  - push
+
+steps:
+  - name: publish
+    pull: always
+    image: plugins/docker:linux-arm64
+    settings:
+      auto_tag: true
+      auto_tag_suffix: linux-arm64
+      repo: gitea/test_env
+      password:
+        from_secret: docker_password
+      username:
+        from_secret: docker_username
+
+---
+kind: pipeline
+name: dry-run
+
+platform:
+  os: linux
+  arch: arm64
+
+trigger:
+  event:
+  - pull_request
+
+steps:
+  - name: dryrun
+    pull: always
+    image: plugins/docker:linux-arm64
+    settings:
+      dry_run: true
+      repo: gitea/test_env
+      tags: linux-arm64