Joins web (nginx-proxy), apps-internal (database), and auth-public
(OIDC discovery without hairpinning) networks. External networks are
pre-created by the stwaddle infra compose; apps-db is defined here
so the budget service can be deployed standalone.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Spencer Twaddle