Execute script from features during prebuild to cache the result?

[amyXia1994]

I'm using the GitHub codespaces with dev container to provide an out-of-box quick start experience to my users. It really helps since my users do not need to install all the tools and dependencies. Now I want to speed up the quick start process further more using a prebuild and here's the problem I could not solve yet:

I'm providing quick start with features: docker-in-docker, kubectl-helm-minikube and kusion(and that's my product's feature). And now each user of my devContainer.json needs to run a minikube start script before they actually experience our product(a quick start tour of kusion). That's time-consuming and I want to speed up it by caching some resources in the prebuild process. For example:

• during minikube start, it will download the gcr.io/k8s-minikube/kicbase image with docker.
• also the minikube start will download a preloaded-tarball, for example: preloaded-images-k8s-v18-v1.25.3-docker-overlay2-amd64.tar.lz4

I want to pre-download these resources in the prebuild. I've tried docker pull gcr.io/k8s-minikube/kicbase withonCreateCommand and it didn't work and produced error OCI runtime exec failed: exec failed: container_linux.go:380: starting container process caused: exec: "docker pull gcr.io/k8s-minikube/kicbase:v0.0.36": stat docker pull gcr.io/k8s-minikube/kicbase:v0.0.36: no such file or directory: unknown

Could you help me with How are these images and tarballs supposed to be pulled during the prebuild?

[ossanna16]

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