feat：完善项目信息

app/api/website/controller/activity.go

@@ -117,7 +117,7 @@ func (c *Activity) Join(id uint64) error {
 	if count > 0 {
 		return errors.New("操作错误，不可重复报名")
 	}
-	if mActivityInstance.Mode == model2.ActivityInstanceModeForOrdinary {
+	if mActivityInstance.Amount <= 0 {
 		service.Publish(config.EventForActivityJoinProduce, c.IdentityUID, c.UID)
 	}
 	return nil