This project is based on article: Create-React-App Continuous Integration Config with CircleCI and the example Repo
curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | sudo apt-key add -
echo "deb https://dl.yarnpkg.com/debian/ stable main" | sudo tee /etc/apt/sources.list.d/yarn.list
sudo apt update
sudo apt install npm yarn
sudo npm i -g npx
hash -d npm
npm -v
Now follow along the instructions from section “New CRA application” in the Medium article.
The final working config.yml should look like the one in this repo .circleci/config.yml