feat: add Docker support with multi-stage build and CI/CD workflow

- Introduced Dockerfile for multi-stage build process using Node.js and Nginx.
- Added .dockerignore to exclude unnecessary files from Docker context.
- Created nginx.conf for server configuration, including gzip compression and SPA routing.
- Implemented Gitea CI/CD workflow for building and pushing Docker images on version tags.

Dockerfile

@@ -0,0 +1,36 @@
+# 第一阶段: 构建应用
+FROM node:22-alpine AS builder
+
+# 安装 pnpm
+RUN npm install -g pnpm
+
+# 设置工作目录
+WORKDIR /app
+
+# 复制依赖配置文件
+COPY package.json pnpm-lock.yaml ./
+
+# 安装依赖
+RUN pnpm install --frozen-lockfile
+
+# 复制源代码
+COPY . .
+
+# 构建应用
+RUN pnpm build
+
+# 第二阶段: 运行应用
+FROM nginx:alpine
+
+# 复制自定义 nginx 配置
+COPY nginx.conf /etc/nginx/nginx.conf
+
+# 从构建阶段复制构建产物
+COPY --from=builder /app/dist /usr/share/nginx/html
+
+# 暴露端口
+EXPOSE 80
+
+# 启动 nginx
+CMD ["nginx", "-g", "daemon off;"]
+