Install node for your mac:
brew install nvm
nvm install 12
nvm alias 12 default
nvm use
Install dependencies:
npm i
Create the database:
sqlite3 db.sqlite < db.sql
Run the server in development mode:
npm run dev
Add the git remote (assumes ownership of 'vax-confirmation'):
heroku git:remote -a vax-confirmation
Push local master to heroku and watch it build:
git push heroku master