ci: deployment

[seabo]

We need to get this bad boy deployed.

My thinking is to run a single EC2 instance, because we won't initially have enough traffic to warrant a bunch of machines. That instance will have three programs running:

• API server
• Web server
• Postgres instance, connected to EBS

Checklist:

• In order to run both API and Nodejs endpoints (for the server-rendered website), I think we need to use nginx to direct traffic to the correct ports
• We should put everything inside a Docker container
• We want to set up automatic deployment when we push to main branch
• ci: staging #117
• We only want to deploy when Github Actions gives us a clean bill of health across all tests and stuff
• We need to think about TLS certificates (see here)
• ci: zero downtime #118
  1. Have a load balancer in front of your app
  2. On deploy, fire up a new container with the latest version of the app, before taking down the old one
  3. Verify the new one is up and running
  4. Transition traffic from old to new with the load balancer
  5. Take down the old one
  6. DB migrations become even trickier than they already are, and you have to think them through at the application code level, not just deployment
• ci: EBS snapshots #119