Set up Docker Swarm and abra
Deploy coop-cloud/traefik
abra app new cryptpad --secrets (optionally with --pass if you'd like to save secrets in pass)
abra app config YOURAPPDOMAIN - be sure to change $DOMAIN to something that resolves to your Docker swarm box
abra app deploy YOURAPPDOMAIN
Open the configured domain in your browser to finish set-up

At this point, anyone with this domain can register new users with this cryptpad instance.

After you have registered a first user, here is how you can make this user into an admin. After logging in as your user, go to: https://cryptpad.cctest.autonomic.zone/profile/

Click "Copy Public Key". This will copy your public key into your clipboard. Then run abra app config YOURAPPDOMAIN and set the value of CRYPTPAD_ADMIN_KEYS to include your public key. The example in .env.sample shows the required format.

Then redeploy with abra app deploy YOURAPPDOMAIN --force.

Now when you login as your user, and visit https://cryptpad.cctest.autonomic.zone/admin/, you should be able to access the admin interface for this cryptpad instance.