Add CLI flags to configure some osmnx settings

[rgreinho]

Feature request

Current Behavior

There is currently no way to configure osmnx.

Expected Behavior

As a user, I would like to be able to define some osmnx settings from the CLI and/or environment variables.

Another use case, is that the Docker container does not need to use the osmnx cache since the container will be discarded at the end of its run.

Possible Solution

Here is the osmnx settings reference: https://osmnx.readthedocs.io/en/stable/internals-reference.html#osmnx-settings-module

[rgreinho]

Here is an example showing how to use the settings: https://github.com/gboeing/osmnx-examples/blob/fef107d0f83843aeb19ccc86c0191252e414a540/notebooks/01-overview-osmnx.ipynb#L37.

More can be found in the same repository.