feat: documentation preview

[ejfitzgerald]

• Added the ability for the docs to be built using docker
• Added automation to trigger PR based build of docs when change is posted

[github-actions[bot]]

Visit the preview URL for this PR (updated for commit 89019d2):

https://fetch-docs-preview--pr203-feature-docs-preview-kn7fjcjc.web.app

_{(expires Sat, 19 Mar 2022 12:25:32 GMT)}

_{🔥 via Firebase Hosting GitHub Action 🌎}