Running two Threadwell sites on one server

Can I run two separate sites (different domains, different databases) on one 8 GB server without a second copy of everything?

Yes — use multisite. One container, two databases, routed by hostname. In your container definition:

hooks:
  after_postgres:
    - exec: sudo -u postgres createdb second_site
env:
  THREADWELL_MULTISITE_HOSTS: "forum.one.example,forum.two.example"

Then run the migrations for the second database once. 8 GB is plenty for two small sites.

Exactly what I needed. Thanks Theo.