A linux build agent for dotnet core stuff, in a container

Inspired by (aka copied from) https://docs.microsoft.com/en-us/azure/devops/pipelines/agents/docker?view=azure-devops

Run something like this docker run -e AZP_URL=<Azure DevOps instance> -e AZP_TOKEN=<PAT token> -e AZP_AGENT_NAME=mydockeragent dockeragent:latest

And Alice is Bobs uncles unknown sister!