Please add OOTB support for running containers using Podman, with the possibility to use containers that utilize systemd

While adding

  packages = [
    pkgs.podman
  ];

podman will not run. Some of the issues might be related to the nix package, but some are related to the environment.

The default policy is missing and no /var/tmp. Had to fix this as follows:

      onCreate = {
        # this is to fix Podman: https://github.com/gbraad-devenv/idx/issues/3
        setup-podman = ''
          mkdir /etc/containers/
          cat >> /etc/containers/policy.json <<EOF
          { "default" : [ { "type": "insecureAcceptAnything"} ]}
          EOF
          mkdir /var/tmp
        '';
      };

After these minor changes, podman can at least run.
https://issuetracker.google.com/issues/370543478

But containers that use systemd, seem to be failing.
https://issuetracker.google.com/issues/370546381