What

• Previously running alembic upgrade head without exporting POSTGRES_HOST=localhost would cause an error.
• Can now run this command locally, and should no longer need to configure IDE or notebooks with a POSTGRES_HOST environment variable.

Why

POSTGRES_HOST was defaulting to db_postgres instead of localhost, which is the value set inside of docker.

Test plan

• Run pytest sdk-python
• Run examples/tests.ipynb and verify that there are no errors
• Run examples/tutorial.ipynb and verify that the tutorial works as expected
• Run examples/images.ipynb and verify that the tutorial works as expected