StorybookJS v6 requires npm --legacy-peer-deps flag

[maany]

Description

NPM v7+ installs peer dependencies by default; this is not the case with previous versions of NPM. NPM modules must name specific versions of their peer dependencies. If you already have a peer dependency installed, but not with a version named by the module, then NPM v7+ will throw an error. Adding --legacy-peer-deps ignores this new requirement, at the risk of introducing breaking changes

Obviously, we would like to avoid having non-pinned dependencies in the package-lock.json.

See storybookjs/storybook#18510 for details. This issue was fixed with the release of Storybook v7.

At the time of writing this, storybook v7.0.0 is in beta. Therefore, one option is to install the storybook beta release instead of using storybook v6

Steps to reproduce

1. Clone the repo
2. npm clean install

Rucio WebUI Version

master

Additional Information

No response

[maany]

Fixed by migrating to Storybook v7 in #133