Jed,
Welcome. Glad you are enjoying using DVSwitch Mobile (DVSM) with Allstar. For what you are asking, you have a couple of choices:

1: Setup a separate Pi for you to use the Digital modes with DVSM.
2: Add the digital modes to your existing AllStar node.

No matter what you choose, I'm going to tell you to wait at least a week to do anything other the gather hardware.
1: is the best option If you have a spare Pi.
2: give you the best overall flexibility but may be more complex to setup depending on how you want things to work.

We are one week away from release of DVSwitch Server. The server image runs on a Raspberry Pi and allows you to setup a server with very little trouble.
We have not tested adding DVSwitch Server to an existing AllStar node. It SHOULD work, but we need to test before recommending.

That having been said, we have 2 subgroups you should consider joining.
1: <https://dvswitch.groups.io/g/allstarlink> Discussion of bridging AllStar to the digital world
2: <https://dvswitch.groups.io/g/Mobile> Discussion of all things DVSM

73, Steve N4IRS