fix: 修复Docker镜像中静态资源加载问题

- 在Dockerfile中添加mailcap包以提供mime类型支持
- 修正静态资源路由路径从"assets/"改为"/assets"
- 显式注册.js和.css文件的mime类型，防止因缺少mime配置导致浏览器加载失败

Dockerfile

@@ -44,7 +44,7 @@ FROM debian:stable-slim
 ENV TZ=Asia/Shanghai
 
 RUN apt-get update \
-    && apt-get install -y ca-certificates tzdata \
+    && apt-get install -y ca-certificates tzdata mailcap \
     && rm -rf /var/lib/apt/lists/*
 
 WORKDIR /app

main.go

@@ -11,6 +11,7 @@ import (
 	"message-nest/routers"
 	"message-nest/service/cron_msg_service"
 	"message-nest/service/cron_service"
+	"mime"
 	"net/http"
 	"os"
 
@@ -27,6 +28,10 @@ var (
 )
 
 func init() {
+	// 设置 mime 类型，防止 docker 镜像中缺少 mime 类型导致 js 文件加载失败
+	mime.AddExtensionType(".js", "application/javascript")
+	mime.AddExtensionType(".css", "text/css")
+	
 	constant.InitReleaseInfo(rf)
 	setting.Setup()
 	logging.Setup()

routers/router.go

@@ -73,7 +73,7 @@ func AppendServerStaticHtmlWithPrefix(router gin.IRouter, f embed.FS, pathPrefix
 		// 无路径前缀时，使用原有逻辑
 		if r, ok := router.(*gin.Engine); ok {
 			r.Use(middleware.StaticCacheMiddleware())
-			r.StaticFS("assets/", http.FS(assets))
+			r.StaticFS("/assets", http.FS(assets))
 			r.GET("/", func(ctx *gin.Context) {
 				ctx.FileFromFS("/", http.FS(dist))
 			})