Reverse Proxying Kestrel with URL Rewrite for IIS

As said in previous posts, we have been developing new services using Asp.net Core and self-hosting as Windows services using Kestrel. A new interesting problem arised, as Kestrel can not share the Http/Https port with IIS or Owin self hosted services we had to use a different port to host each service. In he past we had this problem when hosting APIs with f# suave, and had overcome it redirecting the requests in the F5 Big Ip load balancer. That solution works, but sometimes I feel like it crosses in to the domain of infrastructure instead of development. So in order to contain all the deployment and configuration in TeamCity/Octopus, I decided to use IIS to reverse proxy the calls made to these microservices as explained in: https://weblogs.asp.net/owscott/creating-a-reverse-proxy-with-url-rewrite-for-iis
Basically requests coming to http://+/newmicroserviceapi/ will be rewritten to http://localhost:<microserviceport>/
This is the Octopus Deploy step I created to automate all this:

PowerShell Script:

$siteName = $OctopusParameters['ReverseProxy.IISSiteName']
$pathBase = $OctopusParameters['ReverseProxy.PathBase']
$port = [int] $OctopusParameters['ReverseProxy.Port']
$site = "iis:\sites\$siteName"
$filterName="Reverse proxy inbound $pathBase"
$filterPath = "system.webServer/rewrite/rules/rule[@name='$filterName']"
Write-Host 'Adding reverse proxy rule to '$siteName' for '$pathBase'/*'
Clear-WebConfiguration -pspath $site -filter $filterPath
Add-WebConfigurationProperty -pspath $site -filter "system.webServer/rewrite/rules" -name "." -value @{name=$filterName; patternSyntax='Regular Expressions'; stopProcessing='True';}
Set-WebConfigurationProperty -pspath $site -filter "$filterPath/match" -name "url" -value "$pathBase/(.*)"
Set-WebConfigurationProperty -pspath $site -filter "$filterPath/conditions" -name "logicalGrouping" -value "MatchAny"
Set-WebConfigurationProperty -pspath $site -filter "$filterPath/action" -name "type" -value "Rewrite"
Set-WebConfigurationProperty -pspath $site -filter "$filterPath/action" -name "url" -value "http://localhost:$port/{R:1}"

Octopus Step:

Note that the Application Request Routing IIS pluging is needed.