feat(devcontainer): prebuilds devcontainer image

[sonikro]

No description provided.

[Copilot]

Pull Request Overview

This PR introduces a CI/CD workflow to prebuild devcontainer images, improving developer onboarding speed by publishing prebuilt images to GitHub Container Registry instead of building features on each container creation.

Key Changes:

• Added GitHub Actions workflow to automatically build and push devcontainer images on changes
• Created build configuration at .github/.devcontainer/devcontainer.json with all required features
• Updated .devcontainer/devcontainer.json to reference the prebuilt image

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 5 comments.

File	Description
.github/workflows/devcontainer.yaml	Implements CI/CD pipeline to build and publish devcontainer images to GHCR with version tagging
.github/.devcontainer/devcontainer.json	Defines the build-time configuration including base image, features, and VS Code extensions
.devcontainer/devcontainer.json	Updated to use the prebuilt image instead of building features locally

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[Copilot]

The workflow only triggers on changes to .devcontainer/**, but the build configuration file is located at .github/.devcontainer/devcontainer.json. Changes to the build configuration won't trigger the workflow.

Add .github/.devcontainer/** to the paths:

paths:
  - '.devcontainer/**'
  - '.github/.devcontainer/**'

Suggested change

	- '.devcontainer/**'
	branches:
	- main
	pull_request:
	paths:
	- '.devcontainer/**'
	- '.devcontainer/**'
	- '.github/.devcontainer/**'
	branches:
	- main
	pull_request:
	paths:
	- '.devcontainer/**'
	- '.github/.devcontainer/**'

[Copilot]

Pull Request Overview

Copilot reviewed 3 out of 3 changed files in this pull request and generated 1 comment.

---

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[Copilot]

Missing comma after the appPort array. This will cause a JSON syntax error when the devcontainer configuration is parsed. Add a comma after the closing bracket on line 30.

Suggested change

	]
	],