dev-container build options (for features) cannot be used when using an image but with a Dockerfile

[Roemer]

I have a base image and want to add a feature to it. But I need the --add-host option from the build specification.

When using a Dockerfile, this works:

"build": {
	"dockerfile": "Dockerfile",
	"options": [
		"--add-host=host.docker.internal:host-gateway"
	]
},
"features": {
	"ghcr.io/devcontainers/features/go:1.3.0": {
		"version": "1.22.1"
	}
},

whereas the Dockerfile just contains FROM myImage.

Now instead of a Dockerfile, I thought I could just use the image: myImage property in the devcontainer.json file and get rid of the Dockerfile but when using that, the build property and therefore the options are not valid and are not used when building the image with an additional feature.

• VSCode Version: 1.87.2
• Local OS Version: Windows 10
• Remote OS Version: Debian 11
• Remote Extension/Connection Type: Container in WSL

[vs-code-engineering]

This feature request is now a candidate for our backlog. The community has 60 days to upvote the issue. If it receives 10 upvotes we will move it to our backlog. If not, we will close it. To learn more about how we handle feature requests, please see our documentation.

Happy Coding!

[vs-code-engineering]

This feature request has not yet received the 10 community upvotes it takes to make to our backlog. 10 days to go. To learn more about how we handle feature requests, please see our documentation.

Happy Coding

[vs-code-engineering]

🙁 In the last 60 days, this feature request has received less than 10 community upvotes and we closed it. Still a big Thank You to you for taking the time to create this issue! To learn more about how we handle feature requests, please see our documentation.

Happy Coding!