Add CI on the Readme example

[astanziola]

• I'm submitting a ...

  • bug report
  • feature request
  • other (e.g. discussion of ideas)

• What is the current behavior?
  We don't have any test at all. At least having a test with CI that checks that the example in the README can be run would be great, since we are slowly changing this repo

• What is the expected behavior?
  CI that tests at every merge on the main