Same, I agree with many of the thoughts there. When you get a moment, would you mind writing a guide on how to deploy it to Render.com? It sounds like the Heroku of 2022.
Theoretically, the Dockerfile should "just work"™ with Render.com as well. Right now I focus on fly.io only because their free tier offers PostgreSQL without time limits. Render, I believe, only does so for a period of time.