Here is an overview of how I have set up and use Fargo:
Fargo Publisher is hosted on a Linux server, with node.js running publisher.js.
I have an AWS S3 bucket hosting the content rendered by publisher.js, and the appropriate environment variables set as described in the instructions
My ID for fargo.io is configured to use my instance of Fargo Publisher at pub.frankmcpherson.org
I access fargo.io, log in with my Dropbox credentials, open my Fargo outlines stored in Dropbox. When new content is to be rendered, publisher.js running on pub.frankmcpherson.org is used, which renders the content and puts it in my S3 bucket.
The A name record for frankmcpherson.net points to my Linux server hosting Fargo Publisher, which is actually the same server that pub.frankmcpherson.org ponts to, and Fargo Publisher handles named outlines by pre-pending them to frankmcpherson.net.