Publish images based on `ghcr.io/datadog/images-rb/engines/ruby` with node and npm installed

[cbeauchesne]

DataDog/system-tests uses ghcr.io/datadog/images-rb/engines/ruby images as base images to build weblog images.

To build them, node and npm are required, and are installed with apt. With those deps pre-installed in a base image, not only the build step will be faster, but we won't need any call to apt, reducing the flake probability of the build step.

[TonyCTHsu]

I supposed the reason those applications require node and npm. Is because they are running as a full stack web application.

Would it be feasible that we made those application as API server which does not require node or npm. cc @vpellan

[cbeauchesne]

I supposed the reason those applications require node and npm. Is because they are running as a full stack web application.

yes

Would it be feasible that we made those application as API server which does not require node or npm

The exact purpose of those apps is to simulate what would be ou customer rails HTTP app. Is it possible to have the a rails app without node ?

[vpellan]

The exact purpose of those apps is to simulate what would be ou customer rails HTTP app. Is it possible to have the a rails app without node ?

I believe so, as only Rails 6.0 and Rails 6.1 seems to use Node and npm. As to why, I'm not sure, but these weblogs needs a lot of cleaning (which I plan to do during the next code freeze)

[TonyCTHsu]

Is it possible to have the a rails app without node ?

Yes, you can provide --api flag to the generator, this would configure Rails a API server (removing all the frontend stuff, which our Ruby code does not interact with).

dd-trace-rb master % docker run --rm -it ruby:3.3 bash
root@7770bbb62624:/# gem -v
3.5.22
root@7770bbb62624:/# gem exec -g rails rails new weblog --api --minimal -GMOCAJT

Even with this minimal setup, it still contains lots unnecessary parts can be removed for system tests scenarios

[cbeauchesne]

this would configure Rails a API server

Ah, i understand now your first comment. Yes, it would definitly be better

[lloeki]

only Rails 6.0 and Rails 6.1 seems to use Node and npm. As to why, I'm not sure

Asset management pipeline via webpack{,er}.