Dockerfile needs updating for newer versions of pip

[OneOneFour]

Description.

Howdy, I noticed when trying to get Isca up and running on a Mac via Docker that there is an issue with installing the Isca python dependencies from newer versions of python3-pip on ubuntu on externally managed environments (see screenshot below). This issue can probably be fixed by adding the --break-system-packages flag to the Dockerfile (happy to submit a PR for this), or by pinning the docker file to an older version of ubuntu.

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Screenshots

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Minimal reproducible example

Build Dockerfile using the latest ubuntu image from docker hub via docker build . with no build cache.