code: func (c *Controller) ShowBottle(ctx *gin.Context) {
  	id := ctx.Param("id")
  	bid, err := strconv.Atoi(id)
  	if err != nil {
  		httputil.NewError(ctx, http.StatusBadRequest, err)
  		return
  	}
  	bottle, err := model.BottleOne(bid)
  	if err != nil {
  		httputil.NewError(ctx, http.StatusNotFound, err)
  		return
  	}
  	ctx.JSON(http.StatusOK, bottle)
  }
docs: // ShowBottle godoc
  // @Summary Show a bottle
  // @Description get string by ID
  // @ID get-string-by-int
  // @Tags bottles
  // @Accept  json
  // @Produce  json
  // @Param  id path int true "Bottle ID"
  // @Success 200 {object} model.Bottle
  // @Failure 400 {object} httputil.HTTPError
  // @Failure 404 {object} httputil.HTTPError
  // @Failure 500 {object} httputil.HTTPError
  // @Router /bottles/{id} [get]