Specification for data science stack

### Why it needs to get done

Before starting the implementation we need a specification first.

### What needs to get done

Write a spec answering this questions.
- How we will implement the DSS?
- How do we install DSS (do we use snap?)
- How do we upgrade DSS?
- How do we remove DSS?
- How do we publish DSS?
- What thigs can be achieved with DSS (e.g. notebook creation)?

### When is the task considered done

Specification is approved