Add support for building & running from within a container

[gdm85]

This PR brings 2 main features:

• capability to build 123 from within a container using Docker or Podman
• capability to run 123 from a container

The end users simply have to run ./run-from-container.sh 20 and they will get within a Lotus 1-2-3 window in a few jiffies (well, assuming that they do not have a large terminal and are also affected by #8); I haven't tested with versions 21 and 22 of Ubuntu but in worst case scenarios some dependencies need to be customized.

NOTE: the project directory is mounted as a volume so all build artifacts are retained (same goes for the Lotus 1-2-3 root folder).