Update README.md

Update README.md

Setting restart options in the container run

Adding more information to the README

Updating licence info from original source for attribution.

Adding scripts to build and run the container.

Adding moby installation to agent

Removing git-lfs. We would need to built it manually at this point. Adjust the rest of the script to work for arm32v7

Adding Dockerfile from Dockerfile.template and start.sh from https://github.com/Microsoft/vsts-agent-docker/tree/master/ubuntu

Initial commit