Vignette information on how to use codelistgenerator locally

**Is your feature request related to a problem? Please describe.**
I want to run codelistgenerator locally but dont know how to do it

**Describe the solution you'd like**
A clear and concise description of an example on how to do it locally

**Describe alternatives you've considered**
Do it on the server however if my database does not have that vocab i need i potentially will miss codes i need for my study

**Additional context**
I am working on a federated cancer study where i need codelists for different cancers. The other data partners include primary care, secondary and cancer registry. I only have acccess to primary care therefore my database does not have vocabs for standard cancer i.e. ICD-0-3 which i need if i want to run my study in a cancer registry which uses this vocabs ontop of snomed.