Add config field EnableErrorsRender

Add config field EnableErrorsRender to disable errors output
  with the template data, sometimes we do not want errors output
  with it even in dev mode, especially in API projects.

config.go

@@ -41,6 +41,7 @@ type Config struct {
 	EnableGzip          bool
 	MaxMemory           int64
 	EnableErrorsShow    bool
+	EnableErrorsRender  bool
 	Listen              Listen
 	WebConfig           WebConfig
 	Log                 LogConfig
@@ -174,7 +175,7 @@ func recoverPanic(ctx *context.Context) {
 			logs.Critical(fmt.Sprintf("%s:%d", file, line))
 			stack = stack + fmt.Sprintln(fmt.Sprintf("%s:%d", file, line))
 		}
-		if BConfig.RunMode == DEV {
+		if BConfig.RunMode == DEV && BConfig.EnableErrorsRender {
 			showErr(err, ctx, stack)
 		}
 	}
@@ -192,6 +193,7 @@ func newBConfig() *Config {
 		EnableGzip:          false,
 		MaxMemory:           1 << 26, //64MB
 		EnableErrorsShow:    true,
+		EnableErrorsRender:  true,
 		Listen: Listen{
 			Graceful:      false,
 			ServerTimeOut: 0,