尝试修复非图片文件的重定向问题，并优化了代码结构。

Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.23-bookworm as builder
+FROM golang:1.23-bookworm AS builder
 
 ARG IMG_PATH=/opt/pics
 ARG EXHAUST_PATH=/opt/exhaust

handler/router.go

@@ -3,21 +3,19 @@ package handler
 import (
 	"net/http"
 	"net/url"
+	"path"
 	"regexp"
+	"slices"
+	"strconv"
 	"strings"
 	"webp_server_go/config"
 	"webp_server_go/encoder"
 	"webp_server_go/helper"
-	"slices"
-	"path"
-	"strconv"
 
 	"github.com/gofiber/fiber/v2"
 	log "github.com/sirupsen/logrus"
 )
 
-
-
 func Convert(c *fiber.Ctx) error {
 	// this function need to do:
 	// 1. get request path, query string
@@ -61,12 +59,10 @@ func Convert(c *fiber.Ctx) error {
 
 	log.Debugf("Incoming connection from %s %s %s", c.IP(), reqHostname, reqURIwithQuery)
 
-// 	非图片清况下302到源文件
-// 
-// 
-// 	
-	reqURI := c.Path()
-  filename := path.Base(reqURI)
+	// 	非图片清况下302到源文件
+	//
+	//
+	//
 
 	// 处理根路径请求
 	if reqURI == "/" {
@@ -106,8 +102,8 @@ func Convert(c *fiber.Ctx) error {
 		return c.Redirect(redirectURL, fiber.StatusFound)
 	}
 
-// 
-// 		
+	//
+	//
 
 	if !helper.CheckAllowedType(filename) {
 		msg := "File extension not allowed! " + filename