I have already installed Jest in my React project. I even installed jest-cli, but still can't use Jest in the command line. I can do an npm test, as it is in my package.json, but I have problems with the test, and in order to fix it I need to access the 'jest' command. (I need to run `jest --init` and to create the config file.) Thank you in advance!

See [Getting Started - Jest](https://jestjs.io/docs/en/getting-started).