As topic says, I wonder if this is possible somehow, or if .NET 4.8 requirements prevents this.

It's possible, but you'll need to mount the umbraco filesystem stuff as Umbraco needs it

I guess you're also limited to only running on windows architecture as the docker system host?

Ye you are, and thats usually much slowrr

I have done this previously - on v7 I think - but it was a right royal pain.

Is it not just the same as running v10+ in a docker container? https://skrift.io/issues/umbraco-and-docker-part-1-getting-familiar-with-containers/

Here are some of the things I had to do then: - Change config files to allow environment based overrides using Microsoft.Configuration.ConfigurationBuilders.EnvironmentConfigBuilder - (Lots of tweaking as config builders only work in certain areas and certain ways) - Change various IIS settings in the dockerfile, including folder file permissions, 32bit mode, loaduserProfile, idleTimeout, installing UrlRewrite - Tweaks to get the virtual file system working with S3 bucket from INSIDE the container There was lots of other stuff too, but I think that was mostly hosting related because the project was running on a custom private cloud based of OpenStack.