astro/.devcontainer/component/devcontainer.json

{
  "name": "Component Template",
  "build": {
    "dockerfile": "../examples.Dockerfile"
  },

  "workspaceFolder": "/workspaces/astro/examples/component",

  "postCreateCommand": "pnpm install && cd /workspaces/astro && pnpm run build",

  "waitFor": "postCreateCommand",

  "customizations": {
    "codespaces": {
      "openFiles": ["src/MyComponent.astro"]
    },
    "vscode": {
      "extensions": ["astro-build.astro-vscode", "esbenp.prettier-vscode"]
    }
  }
}