IIS 10, Rewrite URL

Questions
1

Silverstripe Version:
4.1.1
Question:

Hi, i have an problem with rewriting my URL´s in IIS 10 on windows server 2016.

My steps i did:
redirect from www.website.de to www.website.de/public, so i get the silverstripe showed
then with the help of google i found some rewrite snippets that i used to get it rewriting the urls,
but then i tried loging in into the cms and just got plain text and an unsupported browser hint…
i then altered my rules more and more, up to the state were i always get only plain text…

is there maybe sb who could kindly have a look onto my rules?

Thanks in advance, daniel

<?xml version="1.0" encoding="UTF-8"?>
<configuration>
    <system.webServer>
        <directoryBrowse enabled="false" />
	
		<rewrite>

            <outboundRules>
                <rule name="Whatever" preCondition="HTMLCode" stopProcessing="true">
                    <match filterByTags="A, Area, Base, Form, Frame, Head, IFrame, Img, Input, Link, Script" pattern="^(.*)/public/(.*)$" />
                    <action type="Rewrite" value="{R:1}/{R:2}" />
                </rule>
                <preConditions>
                    <preCondition name="HTMLCode">
                        <add input="{RESPONSE_CONTENT_TYPE}" pattern="^text/html" />
                    </preCondition>
                </preConditions>
				
            </outboundRules>
            <rules>
                <clear />
                <rule name="Incoming" stopProcessing="true">
                    <match url="^(.*)/(.*)$" />
                    <conditions logicalGrouping="MatchAll" trackAllCaptures="false" />
                    <action type="Rewrite" url="public/{R:2}" />
                </rule>
                <rule name="Incoming2" stopProcessing="true">
                    <match url="^(.*)$" />
                    <conditions logicalGrouping="MatchAll" trackAllCaptures="false" />
                    <action type="Rewrite" url="public/{R:1}" />
                </rule>
            </rules>
        </rewrite>
        <httpRedirect enabled="true" destination="public" exactDestination="true" childOnly="true" />
    </system.webServer>
</configuration>