Serving a serverless build in a docker image

[martaver]

I've read that the serverless build creates a tree-shaken production build with no dependencies on node_modules.
I want to take advantage of this to slim down my production image for deployment in a GKE cluster.

I understand that I can run the serverless build with next start, which also means, in turn, that I should have at least nextjs installed on the serving image.

Nextjs is huge, though. Something like 400MB+... Surely not all of it is needed to serve the serverless bundles.

Is there a slimmer way to server the serverless build?

[martaver]

I understand this might not be as performant, but with node_modules my image ends up being upwards of 1GB, which is honestly much worse...

[martaver]

Actually, I'm not even sure if this approach makes sense... I'm building with target: serverless and then running with next start (on an image with only next installed), and it's still complaining about missing deps... react, react-dom, styled-components etc...

So I guess it doesn't do all that bundling and tree shaking after all...? Or I'm configuring something very wrong.