XML file used to define a new website in a multisite Sitecore solution. This file should be placed in the App_Config/Include/your-site-name folder.

your-site-name.dev.local.config

<?xml version="1.0"?>
<configuration xmlns:patch="http://www.sitecore.net/xmlconfig/">
    <sitecore>
        <sites>
          <site name="your-site-name" 
				patch:after="site[@name='modules_website']"
				targetHostName="your-site-name.dev.local"
				enableTracking="true" 
				virtualFolder="/" 
				physicalFolder="/"
				rootPath="/sitecore/content/your-root-item-name" 
				startItem="/home" 
				database="web" 
				domain="extranet"
				allowDebug="true" 
				cacheHtml="true" 
				htmlCacheSize="50MB" 
				registryCacheSize="0"
				viewStateCacheSize="0" 
				xslCacheSize="25MB" 
				filteredItemsCacheSize="10MB"
				enablePreview="true" 
				enableWebEdit="true" 
				enableDebugger="true"
				disableClientData="false" 
				cacheRenderingParameters="true"
				renderingParametersCacheSize="10MB" />
        </sites>
    </sitecore>
</configuration>