fix: add correct content-type to their respective files

main.go

@@ -34,21 +34,23 @@ func SafeFileServer(root http.FileSystem) http.Handler {
 		w.Header().Set("X-XSS-Protection", "1; mode=block")
 
 		log.Println("assets handler", r.URL.Path)
+		log.Println(w.Header())
 
 		// Only allow specific file extensions
 		if allowed := func(path string) bool {
-			allowedExts := map[string]bool{
-				".js":   true,
-				".css":  true,
-				".png":  true,
-				".webp": true,
-				".jpg":  true,
-				".jpeg": true,
-				".svg":  true,
-				".ico":  true,
+			allowedExts := map[string]string{
+				".js":   "text/javascript;charset=utf-8",
+				".css":  "text/css;charset=utf-8",
+				".png":  "image/png",
+				".webp": "image/webp",
+				".jpg":  "image/jpeg",
+				".jpeg": "image/jpeg",
+				".svg":  "image/svg+xml",
+				".ico":  "image/x-icon",
 			}
-			for ext := range allowedExts {
+			for ext, contentType := range allowedExts {
 				if strings.HasSuffix(path, ext) {
+					w.Header().Set("Content-Type", contentType)
 					return true
 				}
 			}