Speed up devcontainer build

[kjaymiller]

Not sure why but my devcontainer/codespace for the website takes incredibly long to build.

Perhaps we can investigate and make sure that we're not over-installing dependencies.

[oleksis]

I will push the image to GitHub Container registry

[jefftriplett]

From other Jekyll + GitHub Pages + Docker setups I have used, we have struggled to get Ruby to keep a cache of everything it needs to run. It's been a year(ish) since I looked, but it used to do a fresh gem install when the container started.

If @oleksis's container is doing that then using the image should help skip a bunch of slow steps.

[oleksis]

Thanks for the advice @jefftriplett

[oleksis]

External links

• Speed Up Your Workflow with Prebuilds
• Prebuilding your codespaces

[oleksis]

BPDevs Codespaces
DevContainers and Codespaces
BPDevs Visual Studio Code Profile

[kjaymiller]

Great work on speeding up the build. I wonder if there is something we can do on the local end. It's still relatively slow.

I do wonder what the balance should be as our codespaces container is now almost 5GB!

[oleksis]

Thank @kjaymiller, We can make the image smaller if we don't need Docker in Docker or Act

blackpythondevs.github.io/.devcontainer/devcontainer.json

Lines 19 to 20 in 64a13a0

	"ghcr.io/devcontainers/features/docker-in-docker": {},
	"ghcr.io/devcontainers-contrib/features/act:1": {}

And instead of compiling Python add Python as a DevContainers feature

[kjaymiller]

I think we don't need docker-in-docker as we're not packaging anything in our application. (If I remember act was why you needed docker-indocker)

[oleksis]

Correct then I will update the devcontainer.json