fix(nextjs): Custom server should work on fresh applications

[ndcunningham]

Current Behavior

If you create a fresh next.js app with a custom-server.
Running the custom-server does not work even if you provide the correct production build.

Expected Behavior

Running custom-server target on fresh apps should work.

Related Issue(s)

Fixes #18263

[vercel]

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1 Ignored Deployment

Name	Status	Preview	Updated (UTC)
nx-dev	⬜️ Ignored (Inspect)	Visit Preview	Oct 24, 2023 6:53pm

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✅ Successfully ran 6 targets

• nx affected --target=e2e --base=f0a576746bcca4231d6ba77176e53bfcec6714d6 --head=d374e1d50180a71bacd78892a8194b8e6b5080ed --parallel=1
• nx affected --targets=lint,test,build --base=f0a576746bcca4231d6ba77176e53bfcec6714d6 --head=d374e1d50180a71bacd78892a8194b8e6b5080ed --parallel=3
• nx run-many -t check-imports check-commit check-lock-files check-codeowners documentation --parallel=1 --no-dte
• nx-cloud record -- nx format:check --base=f0a576746bcca4231d6ba77176e53bfcec6714d6 --head=d374e1d50180a71bacd78892a8194b8e6b5080ed
• nx documentation --no-dte
• nx affected -t e2e-macos --parallel=1 --base=f0a576746bcca4231d6ba77176e53bfcec6714d6 --head=d374e1d50180a71bacd78892a8194b8e6b5080ed

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