- setup ci workflow in github actions on github page
- if in-memory db is used for tests, this should run out of the box
- Setup Mongo on Heroku: follow https://developer.mongodb.com/how-to/use-atlas-on-heroku/
- set up automatic deployment: deploy every push on master where ci ran successfully: https://devcenter.heroku.com/articles/github-integration#enabling-github-integration