Allow built server code to run locally

[osdiab]

Right now it works if you run with ts-node without building, but if you try to run the built code directly it'll crash since it can't find any of the packages yarn hoists as part of the workspaces flow.

When you deploy the server it all works because it'll install those dependencies to a local node_modules instead on the remote machine. So this is relatively low pri (you can dev with ts-node and deploy properly) but it is odd that dependencies don't resolve in that way.