feat(tests): add comprehensive unit, integration, and e2e tests for API and database functionality

- Implemented end-to-end tests for API health checks, performance, behavior, and documentation.
- Created integration tests for database connection, CRUD operations, transactions, and connection pool management.
- Developed unit tests for configuration loading, environment variable handling, validation, default values, and helper functions.
- Established a test setup with environment management and basic usage examples for the testing framework.

templates/project/Dockerfile.dev

@@ -0,0 +1,32 @@
+# 开发环境 Dockerfile
+FROM golang:1.22-alpine AS builder
+
+# 安装必要的工具
+RUN apk add --no-cache git ca-certificates tzdata
+
+# 设置工作目录
+WORKDIR /app
+
+# 复制 go mod 文件
+COPY go.mod go.sum ./
+
+# 设置 Go 代理
+RUN go env -w GOPROXY=https://goproxy.cn,direct
+
+# 下载依赖
+RUN go mod download
+
+# 复制源代码
+COPY . .
+
+# 设置时区
+ENV TZ=Asia/Shanghai
+
+# 安装 air 用于热重载
+RUN go install github.com/air-verse/air@latest
+
+# 暴露端口
+EXPOSE 8080 9090
+
+# 启动命令
+CMD ["air", "-c", ".air.toml"]