Deploy the storybook on ui.osrd.fr

[emersion]

Description and goal

Right now we use the GitHub Pages domain. Would be nicer to use the custom domain name.

Ref #53

Somewhat related: #878

Acceptance criteria

.

[Khoyo]

If someone wants to take a crack at it, the domain is managed here: https://github.com/OpenRailAssociation/openrail-dns/blob/main/records/osrd.fr.yaml