Add CONTRIBUTING.md

CONTRIBUTING.md

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+All community interactions should be aligned with our Code of Conduct.
+
+We appreciate your interest in this project and look forward to collaborating around
+respecful issues and pull requests.
+
+To isolate this project from other projects that use Python, we encourage you to create
+a [`venv`](https://docs.python.org/3/library/venv.html) with the commands:
+```bash
+python3 -m venv .venv
+source .venv/bin/activate
+pip install --editable .
+```
+
+We use [`pre-commit`][https://pre-commit.com/] to format, lint, and test files in this
+project so we strongly encourage coontributors to:
+# `pipx install pre-commit` or `brew install pre-commit`
+# Then in the project root directory run `pre-commit install`
+
+This project requires that a current version of `Docker Desktop` is properly installed.

docs/contributing.md

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+# CONTRIBUTING
+```{include} ../CONTRIBUTING.md
+```