This PR expands the recipe for [Set Up App
Proxies](https://nx.dev/recipes/node/application-proxies). There is no
way for us to add proxy config automatically since `proxy.json` is
specific to our executor, and users should use the underlying tools'
proxy support instead.
Also adds an info for users using `--frontendProject` option in
crystalized workspaces.
Note: The proxy feature from Webpack and Vite allow more advanced use
cases, so it's preferred to the old `proxy.json` support anyway.
Preview:
https://nx-dev-git-docs-node-proxy-config-nrwl.vercel.app/recipes/node/application-proxies#set-up-application-proxies
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## Current Behavior
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## Expected Behavior
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## Related Issue(s)
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Fixes#27321, #23158