Verify the README information

[rluders]

Description

I was checking the README instructions, and it seems that some commands are not working. For example the one for e2e tests. In this case, I think that would be better to verify all the instructions, and also standardize the commands.

Expected behavior

All the commands should be working.

Additional context

We also need to give some option, like, you can run it with yarn or npm

[marianyfs]

I updated some README.md instructions when I added Cypress AXE and Storybook, tested all the commands and was able to run successfully (using yarn)

[rluders]

So, I guess that we are good. Thank you.