# Config options A reminder that Kirby config options docs can be found at , but here we will explain what is in Zero One theme config. ### Multi-environment setup **From Zero One version 1.1.0** in `zero-one/site/config/` folder there are three files: * `config.php` * `config.localhost.php` and `config.zero-one.test.php` which are the same * You can delete them if you don't develop your website [locally](/guide/installation/local-environment.md) * and `config.www.thezero.club.php`. This one you should rename to your domain name. The `config.localhost.php` and `config.yourdomain.com.php` should have only those options that are different on localhost and on live server. In Zero One default setup only difference is a debug option, which is at localhost set to true, and on live server set to false. {% hint style="warning" %} **If you are not using a multi-environment setup** you can add all config options into **`site/config.php`** and delete the other configs. But it is more functional to use multi-environment configs because if we update something in the main config you won't override your change when you update to new Zero One version. {% endhint %} One of the options you will need to add on the live server if you want to edit content from the panel is panel install, see more at . ``` # Example setup /site/config/config.localhost.php /site/config/config.staging.yourdomain.com.php /site/config/config.yourdomain.com.php /site/config/config.www.yourdomain.com.php ``` Learn more ### Debug Debug is set to true in localhost and of course to false on the server. {% hint style="danger" %} **Important note:** When debugging is turned on, robots.txt will tell the crawlers not to index your website. So, make sure to turn off debugging mode when your website is live. {% endhint %} ### Custom panel CSS There is an import for the custom panel CSS file. Zero One use it to customize Editor user role permissions. That file is **`assets/css/panel.css`** and you can customize it further. ### Smartypants Smartypants are on by default in Zero One. Learn more about it at ### ~~Autoresize~~ From Zero One version 5.0.2 Kirby Autoresize plugin is removed, and its config options. Now you can change image upload optimization settings in these files: * `site\plugins\zero-one\blueprints\files\image.yml` * `site\plugins\zero-one\blueprints\files\default.yml` ### Srcset There is a srcset image size setup, and it is used only for images inserted into the Editor in articles. ### Robots There is also some settings code for [Kirby 3 Robots.txt](https://github.com/bnomei/kirby3-robots-txt) plugin from Bruno Meilick. You can add your custom rules, so check the plugin documentation. ### Hooks There is also a little `site.update:after` hook which is needed to write CSS code from the Site Styling Custom CSS input to `assets/css/site.css`. ### Plugins We also disallowed version info for some plugins that shouldn't have that information. And that's it, the rest is up to you. 🙂 --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://www.one.thezero.club/guide/installation/config-options.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.