web.config

<?xml version="1.0" encoding="UTF-8"?>
<configuration>
    <system.webServer>
        <httpProtocol>
            <customHeaders>
                <add name="Access-Control-Allow-Origin" value="*" />
                <add name="Access-Control-Allow-Methods" value="*" />
                <add name="Access-Control-Allow-Headers" value="*" />
                <add name="Access-Control-Allow-Credentials" value="*" />
            </customHeaders>
        </httpProtocol>
        <staticContent>
            <mimeMap fileExtension=".md" mimeType="text/x-markdown" />
            <mimeMap fileExtension=".m3u8" mimeType="application/x-mpegURL" />
        </staticContent>
        <httpErrors>
            <remove statusCode="404" subStatusCode="-1" />
            <error statusCode="404" prefixLanguageFilePath="" path="/404/index.html" responseMode="ExecuteURL" />
        </httpErrors>
    </system.webServer>
</configuration>