fix: fall back to nx.app if no cloud url is set in nx.json

[MaxKless]

No description provided.

[nx-cloud]

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✅ Successfully ran 6 targets

• nx affected --target=build --parallel=3 --configuration=ci
• nx affected --target=e2e --parallel=3 --configuration=ci
• nx affected --target=lint --parallel=3 --configuration=ci
• nx affected --target=test --parallel=3 --configuration=ci
• nx-cloud record -- yarn exec nx format:check
• nx-cloud record -- yarn exec nx workspace-lint

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