1. {% data variables.product.prodname_github_codespaces %} for your repository are configured in a `devcontainer.json` file. If your repository does not already contain a `devcontainer.json` file, add one now. See "[Add a dev container configuration to your repository](/free-pro-team@latest/codespaces/setting-up-your-project-for-codespaces/setting-up-your-project-for-codespaces)."