This change adds a `Dockerfile` which uses multi-stage build directives
to build a minimal image of the `web-api-commander` jar file.
This will allow for easily reproducible builds across development
environments.
The docker image artifact can also be used in environments where it is not
convenient to install Java such as a shared Jenkins environment.
* Update README.md
Co-authored-by: Alexander Paz <alexjpaz@users.noreply.github.com>