feat: Update CONTRIBUTING.md

Signed-off-by: Caijinglong <cjl_spy@163.com>

CONTRIBUTING.md

@@ -1,9 +1,53 @@
 # CONTRIBUTING
 
-The git commit log title to see [conventionalcommits](https://www.conventionalcommits.org/en/v1.0.0/)
+## 配置项目
 
-Like next:
+```sh
+gh repo clone cfug/dio_issue_release_action
+cd dio_issue_release_action
+dart pub get
+```
+
+> 所有代码均在 main 分支上进行开发。
+
+## 添加新的包
+
+在 [lib/src/pkg.dart](lib/src/pkg.dart) 文件中添加新的包。
+
+## 发布说明
+
+### 发布新版本
+
+1. 修改 `CHANGELOG.md` 文件，添加新版本的内容
+2. 修改 `pubspec.yaml` 文件，修改版本号
+3. 使用 `gh release create vx.y.z` 创建新的 release，版本号需要包含 v
+
+> action 会根据 tag 的版本号来将 main 分支的代码合并到对应的 version 分支
+> 例：`v2.3.4` 的 tag 会将 main 的代码分别合并到 v2 v2.3 分支上
+> 如果没有对应的分支，action 会自动创建
 
-```bash
-git commit -m "feat: add new feature"
+## Configuring the project
+
+```sh
+gh repo clone cfug/dio_issue_release_action
+cd dio_issue_release_action
+dart pub get
 ```
+
+> All code is developed on the main branch.
+
+## Add a new package
+
+Add a new package in the [lib/src/pkg.dart](lib/src/pkg.dart) file.
+
+## Release notes
+
+### Release a new version
+
+1. Modify the `CHANGELOG.md` file to add the content of the new version
+2. Modify the `pubspec.yaml` file to change the version number
+3. Use `gh release create vx.y.z` to create a new release, the version number needs to include v
+
+> The action will merge the code from the main branch to the corresponding version branch based on the version number of the tag
+> Example: The tag `v2.3.4` will merge the code from main to the v2 and v2.3 branches respectively
+> If there is no corresponding branch, the action will create it automatically