fix(docker): Suppress error PEP-668 / housekeep: amend .ignore files

When using docker (compose), we don't create a venv and just install python packages system-wide.

With python 3.11 (PEP 668) we need to explicitly tell pip to allow this.

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Prevent some files/dirs to end up in the repo / docker image:

• directories typically used for python virtualenvs
• files that are being generated by running tests

Signed-off-by: moson-mo mo-son@mailbox.org