1 - Node Version Manager or Node.js - v16.12.0 2 - System based Unix 3 - Yarn or Npm
1 - Open folder on terminal
2 - Run $ nvm use
for set Node.js v16.12.0
3 - Update ./operations
file with new lines or $ cat operations <<INPUT_LINES>>
4 - Run $ yarn authorization
1 - $ yarn test
or $ yarn test:<<TEST_NAME>>