Molecule automated testing

Runs locally, let's see what the CI thinks of it!

@chris in the molecule/default/prepare.yml I added some packages which are installed before the role runs such as Nginx and Nodejs v12. For now, I think this is fine but once the build is green I will swap them out for the roles you are using over at https://git.coop/meet/servers/-/blob/master/bbb.yml#L9 so that the testing is closer to what is really done.