koa + typescript + typeorm + mysql 的后端项目开发模板，该模板通过多次开发 koa 项目，在长期积累和沉淀后总结而成。
koa + typescript + typeorm + mysql
pnpm startpnpm install在项目根目录下创建 .env 环境变量文件。
APP_PORT=7778 # 服务启动端口
MYSQL_PORT=3306 # mysql 数据库端口
MYSQL_HOST=localhost # mysql主机地址
MYSQL_USER=root # mysql 用户名
MYSQL_PASSWORD=1118 # mysql 密码
MYSQL_DATABASE=demo_db # 数据库名称，若数据库不存在，则需执行 `pnpm init:db` 初始化数据库
首次运行时，需要执行初始化命令创建数据库和相关数据表
pnpm init:dbpnpm dev
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TypeScript is a superset of JavaScript that compiles to clean JavaScript output.
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