Support HMR in the ssr-dev-server

[rd-max-hartmann]

ssr-dev-server doesn't support HMR right now as described here:
https://nx.dev/packages/webpack/executors/ssr-dev-server

It would be nice if the ssr-dev-server also supports HMR like the wepack-dev-server! It's annoying to refresh the application manually.

thx

[github-actions[bot]]

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