Add workdir to CI

[peterdudfield]

Detailed Description

Would it be possible to add `workingdir

Context

• https://stackoverflow.com/questions/58139175/running-actions-in-another-directory
• This allows us to run this on mono-repos
• Api v1 open-source-quartz-solar-forecast#288

Possible Implementation

• add input of working-directory and add to each step. Default should be '.'