These days Render is my go-to tool for deploying Rails apps.
For example, SupeRails.com has been hosted there for 2 years now.
Render is as easy as Heroku to maintain, but cheaper to scale!

Try Render: https://fnf.dev/43PHC4F

Timestamps:
0:00 SupeRails on Render
1:58 Switch Sqlite to Postgres
03:50 Solid on single database
08:36 Solid Queue and Mission Control
13:36 Scaffold Posts
14:13 Deploy to Render
19:57 Render console
20:50 Render.yml Blueprints
22:15 One-click deploy

P.S. A big thank you to Render.com for sponsoring this article! It gave me the opportunity to dive deeper into deploying Solid with PostgreSQL and explore Render.