Npm should run as a service in dev

[alexgarel]

Describe the bug

This is a sister issue to #5845, the bug is the same.

But in this case we would also like that updating a resource do not cost time to the developer. Also we want to follow common practices.

To Reproduce

see #5845

Expected behavior

In dev we want any change to CSS / JS and so on, to be imediatly taken into account.

The usual way to do this in dev is to

• have a node container running (should run only in dev, we can add it to dev.yml)
• this containe should run npm run serve
• nginx request for resources should redirect to it but ONLY in dev (we have to play on nginx configuration for that)

Screenshots

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Additional context

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Type of device

Other

Browser version

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Number of products impacted

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Time per product

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