Make sure compliance-trestle demos are running correctly - Creating an SSP using trestle author

[AleJo2995]

Compliance trestle demos repo is outdated and needs refreshment and review.

It is needed to go through the Creating an SSP using trestle author review it runs correctly as the documentation specifies concretely for this one.

Compliance-trestle version used for the generation of the demos is too outdated now vs the current one, so as part of the revision, it should be ideal to run the demo with the latest version and see if anything has changed or needs refreshment.

If there is anything needed to be done there by the demo, please submit a PR against the repo to be reviewed and tracked.

[AleJo2995]

Moving comments from @Ma1h01 from original repo:

The instructions in the README use odd commands. I made a pull request to correct them and refactor the demo directory.

[AleJo2995]

Will provide feedback on the PR. Thanks