Add contributing guide

CONTRIBUTING.md

@@ -0,0 +1,72 @@
+# 向 Certimate 贡献代码
+
+感谢你抽出时间来改进 Certimate！以下是向 Certimate 主仓库提交 PR（Pull Request）时的操作指南。
+
+- [向 Certimate 贡献代码](#向-certimate-贡献代码)
+  - [前提条件](#前提条件)
+  - [修改 Go 代码](#修改-go-代码)
+  - [修改管理页面 (Admin UI)](#修改管理页面-admin-ui)
+
+## 前提条件
+
+- Go 1.22+ (用于修改 Go 代码)
+- Node 20+ (用于修改 UI)
+
+如果还没有这样做，你可以 fork Certimate 的主仓库，并克隆到本地以便进行修改：
+
+```bash
+git clone https://github.com/your_username/certimate.git
+```
+
+> **重要提示：**
+> 建议为每个 bug 修复或新功能创建一个从 `main` 分支派生的新分支。如果你计划提交多个 PR，请保持不同的改动在独立分支中，以便更容易进行代码审查并最终合并。
+> 保持一个 pr 只实现一个功能。
+
+## 修改 Go 代码
+
+假设你已经对 Certimate 的 Go 代码做了一些修改，现在你想要运行它：
+
+1. 进入根目录
+2. 运行以下命令启动服务：
+   ```bash
+   go run main.go serve
+   ```
+
+这将启动一个 Web 服务器，默认运行在 `http://localhost:8090`，并使用来自 `ui/dist` 的预构建管理页面。
+
+**在向主仓库提交 PR 之前，建议你：**
+
+- 为你的改动添加单元测试或集成测试（Certimate 使用 Go 的标准 `testing` 包）。你可以通过以下命令运行测试（在项目根目录下）：
+
+  ```bash
+  go test ./...
+
+  ```
+
+## 修改管理页面 (Admin UI)
+
+Certimate 的管理页面是一个基于 React 和 Vite 构建的单页应用（SPA）。
+
+要启动 Admin UI：
+
+1. 进入 `ui` 项目目录
+2. 运行 `npm install` 安装依赖
+3. 启动 Vite 开发服务器：
+   ```bash
+   npm run dev
+   ```
+
+你可以通过浏览器访问 `http://localhost:5173` 来查看运行中的管理页面。
+
+由于 Admin UI 只是一个客户端应用，运行时需要 Certimate 的后端服务作为支撑。你可以手动运行Certimate，或者使用预构建的可执行文件。
+
+
+所有对 Admin UI 的修改将会自动反映在浏览器中，无需手动刷新页面。
+
+完成修改后，运行以下命令来构建 Admin UI，以便它能被嵌入到 Go 包中：
+
+```bash
+npm run build
+```
+
+完成所有步骤后，你可以将改动提交 PR 到 Certimate 主仓库。

CONTRIBUTING_EN.md

@@ -0,0 +1,73 @@
+# Contributing to Certimate
+
+Thank you for taking the time to improve Certimate! Below is a guide for submitting a PR (Pull Request) to the main Certimate repository.
+
+- [Contributing to Certimate](#contributing-to-certimate)
+  - [Prerequisites](#prerequisites)
+  - [Making Changes in the Go Code](#making-changes-in-the-go-code)
+  - [Making Changes in the Admin UI](#making-changes-in-the-admin-ui)
+
+## Prerequisites
+
+- Go 1.22+ (for Go code changes)
+- Node 20+ (for Admin UI changes)
+
+If you haven't done so already, you can fork the Certimate repository and clone your fork to work locally:
+
+```bash
+git clone https://github.com/your_username/certimate.git
+```
+
+> **Important:**
+> It is recommended to create a new branch from `main` for each bug fix or feature. If you plan to submit multiple PRs, ensure the changes are in separate branches for easier review and eventual merge.
+> Keep each PR focused on a single feature or fix.
+
+## Making Changes in the Go Code
+
+Once you have made changes to the Go code in Certimate, follow these steps to run the project:
+
+1. Navigate to the root directory.
+2. Start the service by running:
+   ```bash
+   go run main.go serve
+   ```
+
+This will start a web server at `http://localhost:8090` using the prebuilt Admin UI located in `ui/dist`.
+
+**Before submitting a PR to the main repository, consider:**
+
+- Adding unit or integration tests for your changes. Certimate uses Go’s standard `testing` package. You can run tests using the following command (while in the root project directory):
+
+  ```bash
+  go test ./...
+  ```
+
+## Making Changes in the Admin UI
+
+Certimate’s Admin UI is a single-page application (SPA) built using React and Vite.
+
+To start the Admin UI:
+
+1. Navigate to the `ui` project directory.
+2. Install the necessary dependencies by running:
+   ```bash
+   npm install
+   ```
+3. Start the Vite development server:
+   ```bash
+   npm run dev
+   ```
+
+You can now access the running Admin UI at `http://localhost:5173` in your browser.
+
+Since the Admin UI is a client-side application, you will also need to have the Certimate backend running. You can either manually run Certimate or use a prebuilt executable.
+
+Any changes you make in the Admin UI will be automatically reflected in the browser without requiring a page reload.
+
+After completing your changes, build the Admin UI so it can be embedded into the Go package:
+
+```bash
+npm run build
+```
+
+Once all steps are completed, you are ready to submit a PR to the main Certimate repository.

README.md

@@ -161,7 +161,7 @@ Certimate 是一个免费且开源的项目，采用 [MIT 开源协议](LICENSE.
 
 你可以通过以下方式来支持 Certimate 的开发：
 
-* 提交代码：如果你发现了 bug 或有新的功能需求，而你又有相关经验，可以提交代码给我们。
+* [提交代码：如果你发现了 bug 或有新的功能需求，而你又有相关经验，可以提交代码给我们](CONTRIBUTING.md)。
 * 提交 issue：功能建议或者 bug 可以[提交 issue](https://github.com/usual2970/certimate/issues) 给我们。
 
 支持更多服务商、UI 的优化改进、BUG 修复、文档完善等，欢迎大家提交 PR。

README_EN.md

@@ -163,7 +163,7 @@ Certimate is a free and open-source project, licensed under the [MIT License](LI
 
 You can support the development of Certimate in the following ways:
 
-* **Submit Code**: If you find a bug or have new feature requests, and you have relevant experience, you can submit code to us.
+* **Submit Code**: If you find a bug or have new feature requests, and you have relevant experience, [you can submit code to us](CONTRIBUTING_EN.md).
 * **Submit an Issue**: For feature suggestions or bugs, you can [submit an issue](https://github.com/usual2970/certimate/issues) to us.
 
 Support for more service providers, UI enhancements, bug fixes, and documentation improvements are all welcome. We encourage everyone to submit pull requests (PRs).
@@ -174,4 +174,4 @@ Support for more service providers, UI enhancements, bug fixes, and documentatio
 
 * Wechat Group 
 
-<img src="https://i.imgur.com/lJUfTeD.png" width="400"/>
+<img src="https://i.imgur.com/zSHEoIm.png" width="400"/>