add support for css files

code/components/jomjol_fileserver_ota/server_help.cpp

@@ -120,6 +120,8 @@ esp_err_t set_content_type_from_file(httpd_req_t *req, const char *filename)
         return httpd_resp_set_type(req, "image/x-icon");
     } else if (IS_FILE_EXT(filename, ".js")) {
         return httpd_resp_set_type(req, "text/javascript");
+    } else if (IS_FILE_EXT(filename, ".css")) {
+        return httpd_resp_set_type(req, "text/css");
     }
     /* This is a limited set only */
     /* For any other type always set as plain text */