- create directory .well-known with dot
- create web.config inside of .well-known with
<?xml version="1.0"?>
<configuration>
  
  <system.web>
    <!-- Make directory public. Allow anonymous users access to everything in this directory. -->
    <authorization>
      <allow users="*"/>
    </authorization>
  </system.web>
  
  <system.webServer>
    <!-- Directory only contains plain text files. -->
    <staticContent>
      <mimeMap fileExtension=".*" mimeType="text/plain" />
    </staticContent>
    
    <!-- Only static files are allowed, so remove everything but the StaticFile handler. This also solves the issue with extensionless files returning a 404 Page Not Found. -->
    <handlers>
      <clear />
      <add name="StaticFile" path="*" verb="*" type="" modules="StaticFileModule,DefaultDocumentModule,DirectoryListingModule" scriptProcessor="" resourceType="Either" requireAccess="Read" allowPathInfo="false" preCondition="" responseBufferLimit="4194304" />
    </handlers>
  </system.webServer>
  
</configuration>