Merge pull request 'FIX: no longer serving of directory named 'index.html'' (#6) from supitszaire/indir:main into main

Reviewed-on: https://codeberg.org/arimelody/indir/pulls/6

main.go

@@ -174,7 +174,7 @@ func main() {
 
 		// serve index.html if present (case-sensitive)
 		indexPath := filepath.Join(fpath, "index.html")
-		if _, err := os.Stat(indexPath); err == nil {
+		if indexInfo, err := os.Stat(indexPath); err == nil && !indexInfo.IsDir() {
 		    http.ServeFile(w, r, indexPath)
 			return
 		}