Deploy Asp.net 5 application Fails with "Alternatively, install the framework version '5.0-CodePudding

I am trying to deploy a asp .net 5 app to Google Kubernetes Engine. Before i do this with my production application i thought it best to start with the basics and deploy a simple .net 5 web app.

I have created a simple web app

mkdir HellowWorldAspNet
cd HellowWorldAspNet
dotnet new web
dotnet restore 
dotnet publish

cd \bin\Debug\net5.0\publish

Then I created a Dockerfile

FROM mcr.microsoft.com/dotnet/aspnet:5.0 AS build
ADD ./ /app
ENV ASPNETCORE_URLS=http://*:${PORT}
WORKDIR /app
ENTRYPOINT [ "dotnet", "HellowWorldAspNetCore.dll" ]

Now I try to push it up to Google cloud K8s

// publish the google container
gcloud builds submit --tag gcr.io/{MyProject}/hello-dotnet:v1

// run the pod
kubectl run hello-dotnet --image gcr.io/{MyProject}/hello-dotnet:v1 --port=8080

// Show what pods are running
kubectl get pods

Shows

When i check the logs for the pod i see

kubectl logs hello-dotnet

The specified framework 'Microsoft.AspNetCore.App', version '5.0.0' was not found.

Check application dependencies and target a framework version installed at: /usr/share/dotnet/shared/Microsoft.AspNetCore.App

Alternatively, install the framework version '5.0.0'.

I am assuming it has something to do with the docker file but as far as i can tell this should be FROM mcr.microsoft.com/dotnet/aspnet:5.0 AS build telling it to at least build with .net 5 how do I tell it to run with it as well?

Changing it to

FROM mcr.microsoft.com/dotnet/aspnet:5.0 AS runtime

Didn't seam to help.

Admittedly I am following a very old