00f5405b

By: Michael Lynch <git@mtlynch.io>

Configure NixCI default branch selector

Use the :default selector required by NixCI for deployments from the
repository's configured default branch.

Testing: ./dev-scripts/build-all-flake-targets
configuredevShellx86_64-linuxbackendbackend-devcheck-bashcheck-frontendcheck-go-formattingcheck-go-test-packagescheck-trailing-newlinecheck-trailing-whitespacedefaultdeploy-to-flydocker-imagee2e-testsgo-testsgrosireegrosiree-devjs-testslint-sqlx86_64-linux