Update docker.rst
Update docker.rst

the `gen-keys' located in the project root...
Royal-Society-of-New-Zealand/NZ-ORCID-Hub,Royal-Society-of-New-Zealand/NZ-ORCID-Hub,Royal-Society-of-New-Zealand/NZ-ORCID-Hub,Royal-Society-of-New-Zealand/NZ-ORCID-Hub