You will need Hugo 0.140.2 installed on your operating system and in the PATH.
See the official Hugo documentation for OS-specific instructions.
You can use npm run to run the documentation site locally:
npm run v7- http://localhost:1313/identityserver/v7/npm run v6- http://localhost:1313/identityserver/v6/npm run foss- http://localhost:1313/foss/