Setup

asdf local ruby 3.0.1
asdf local nodejs 14.15.0
npm install --global yarn

yarn install
bundle install

If you are one of that rich kids with a new fancy MacBook Pro M1 and have a problem with installing nodeJS, please try to type

arch -x86_64 zsh
asdf local ruby 3.0.1
asdf local nodejs 14.15.0
npm install --global yarn

yarn install
bundle install

Starting app

rails server

if everything went ok you should be able to navigate to

localhost:3000

and see RoR default welcome page