func getFilePath(uid, prefix string, size int) string {
	return filepath.Join(".moul", "photos", uid, prefix, strconv.Itoa(size))
}
get file path
package internal
import (
	"fmt"
	"image"
	"log"
	"os"
	"path/filepath"
	"strconv"
	"strings"
	"github.com/disintegration/imaging"
	"github.com/gosimple/slug"
	"github.com/spf13/viper"
)
type Collection struct {
	ID       string `json:"id"`
	Name     string `json:"name"`
	Src      string `json:"src"`
	Color    string `json:"color"`
	SrcHd    string `json:"src_hd"`
	Width    int    `json:"width"`
	WidthHd  int    `json:"width_hd"`
	Height   int    `json:"height"`
	HeightHd int    `json:"height_hd"`
}