Add WWW Rewrite

 <rule name="Add WWW" stopProcessing="true">
              <match url="^(.*)$" />
              <conditions>
                 <add input="{HTTP_HOST}" pattern="^(?!www\.)(.*)$" />
              </conditions>
              <action type="Redirect" url="https://www.{C:0}{PATH_INFO}" redirectType="Permanent" />
</rule>