add swagger

providers/captcha/captcha.go

@@ -26,7 +26,7 @@ func Provide(opts ...opt.Option) error {
 	o := opt.New(opts...)
 	var conf Config
 	if err := o.UnmarshalConfig(&conf); err != nil {
-		log.Fatal(err)
+		return err
 	}
 
 	return container.Container.Provide(func() (*Captcha, error) {

providers/captcha/config.go

@@ -27,7 +27,6 @@ type Config struct {
 	OpenTimeOut string  // 防爆破验证码超时时间，单位：s(秒)
 	MaxScrew    float64 // MaxSkew max absolute skew factor of a single digit.
 	DotCount    int     // Number of background circles.
-
 }
 
 func (c *Config) OpenCaptchaTimeOutDuration() time.Duration {