Devops: should rebuild Storybook files automatically

In bcrs-shared-components repo, the Storybook app is built to demo all components. The SB build files are copied to the docs/ folder and Github automatically publishes them.

However, this is currently a manual process: each user, when they change components in this repo, needs to rebuild and commit the SB files.

This ticket is to implement the SB build steps in one of our actions (probably the CI script).

** At the same time, the "docs/.nojekyll" file needs to be retained or re-created when SB is rebuilt.