fix(storybook): do not set default host as localhost

[mandarini]

Current Behavior

host defaults to localhost, overriding native behaviour.

Expected Behavior

host should not default to anything (if not set, leave undefined)

Related Issue(s)

Fixes #18376

[vercel]

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Name	Status	Preview	Comments	Updated (UTC)
nx-dev	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Aug 1, 2023 0:42am

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✅ Successfully ran 7 targets

• linux nx affected --target=e2e --base=fd6bccddff1a71cc971e6e92539e476c764cd493 --head=26640c91ae8b82fad43d2d0ddc23d5cb65451742 --parallel=1
• linux nx affected --target=test --base=fd6bccddff1a71cc971e6e92539e476c764cd493 --head=26640c91ae8b82fad43d2d0ddc23d5cb65451742 --parallel=1
• linux nx affected --target=build --base=fd6bccddff1a71cc971e6e92539e476c764cd493 --head=26640c91ae8b82fad43d2d0ddc23d5cb65451742 --parallel=3
• linux nx run-many -t check-imports check-commit check-lock-files check-codeowners documentation --parallel=1 --no-dte
• linux nx affected --target=lint --base=fd6bccddff1a71cc971e6e92539e476c764cd493 --head=26640c91ae8b82fad43d2d0ddc23d5cb65451742 --parallel=3
• nx-cloud record -- nx format:check --base=fd6bccddff1a71cc971e6e92539e476c764cd493 --head=26640c91ae8b82fad43d2d0ddc23d5cb65451742
• linux nx documentation --no-dte

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