The app contains a configuration file specified at build time using [these instructions](https://github.com/element-hq/element-web/blob/develop/apps/desktop/README.md#config).
This config can be overwritten by the end using by creating a `config.json` file at the paths described [here](https://github.com/element-hq/element-web/blob/develop/apps/desktop/README.md#user-specified-configjson).
1.`update_base_url`: Specifies the URL of the update server, see [document](https://github.com/element-hq/element-web/blob/develop/apps/desktop/docs/updates.md).