完善错误处理逻辑，统一使用 BizErr 包装业务错误，提供打印源码跳转并返回合适的 http 状态码

pkg/env/env.go

@@ -11,19 +11,24 @@ import (
 
 // region app
 
+const (
+	RunModeDev  = "debug"
+	RunModeProd = "production"
+)
+
 var (
-	RunMode = "debug" // debug, production
+	RunMode = RunModeDev
 )
 
 func loadApp() {
 	_RunMode := os.Getenv("RUN_MODE")
 	switch _RunMode {
-	case "debug", "production":
+	case RunModeDev, RunModeProd:
 		RunMode = _RunMode
 	case "":
 		break
 	default:
-		panic("环境变量 RUN_MODE 的值只能是 debug 或 production")
+		panic("环境变量 RUN_MODE 的值只能是 " + RunModeDev + " 或 " + RunModeProd)
 	}
 }