"docker-compose up" and your OS, codebase, dependecies and data is up and running locally in the exposed local port of your preference. You can even split parts in different layers to mimic a services/cross-region logic.

Of course this won't fix the fact that you have a lambda behind api gateway that does some heic->jpg conversion and can't be hit outside the DMZ, or some esoteric SQS queue that you can't mimmic locally - but it should get you almost there.