fix(tests): fix local development tests through docker

[makors]

Proposed changes

• Update Ion documentation to reflect updated local testing through various methods
• Fix OAuth Settings to work locally with pytest
• Fix deprecated config setting

Brief description of rationale

The people need to test!!!

[coveralls]

coverage: 79.266% (+0.02%) from 79.243%
when pulling 3bf2c33 on makors:fix_local_tests
into d3d3780 on tjcsl:dev.

[aarushtools]

Hi Bryce,

You actually bring up a good point about pytest docs being out of date. To my knowledge, Ion doesn't use pytest meaningfully anywhere, since we opt to use Django's test runner instead (even in CI). Can you actually just remove any references to pytest, including in dependencies, docs, etc. The other changes are good.