How to nixify the idpbuilder tool to have a devbox dev environment for backstage devs. github.com/cnoe-io/idpbuilder existing nix flake mentioning idpbuilder https://gist.github.com/JamesAtIntegratnIO/4c594ee91443a0a873b245f868206398 github.com/cnoe-io/idpbuilder stacks are optional extras: sso keycloak, crossplane, https://github.com/cnoe-io/stacks