don't send content-disposition header for index.html

src/upload.rs

@@ -24,10 +24,11 @@ const ID_CHARS: &[char] = &[
 ];
 
 pub async fn index(config: web::Data<Config>) -> Result<NamedFile, Error> {
-    NamedFile::open(config.static_dir.join("index.html")).map_err(|file_err| {
+    let file = NamedFile::open(config.static_dir.join("index.html")).map_err(|file_err| {
         log::error!("index.html could not be read {:?}", file_err);
         error::ErrorInternalServerError("this file should be here but could not be found")
-    })
+    })?;
+    Ok(file.disable_content_disposition())
 }
 
 pub async fn upload(