Add some additional demo-service and demo scans

[rfelber]

Is your feature request related to a problem? Please describe.
As a new project visitor i would like to test and experiment with the new SCB stack without attacking a real infrastructure at first.

Describe the solution you'd like
Therefore it would be helpful if some additional _demo/dummy/test services are available or even documented in the README.md which i could install and scan.

• JuiceShop
• BodgeIT Store
• SwaggerPet Store API
• Vulnerable API: https://github.com/rahulunair/vulnerable-api
• Old Wordpress