# Variables On this page all important variables defined for daily usage are documented. All variables mentioned here can be declared in a `yaml` configuration file. Have a look at the [configuration](./index.md#configuration) chapter for details on where to find the configuration directory. The following configuration variables are available and can be set to your liking: | Name | Type | Default value | Description | | ---------------------------------- | ---- | ----------------------------------------------------------------------- | ---------------------------------------------------------------------------------------------------------------------------- | | `forge_container_name` | str | Project name derived from `forge_git_repository_url` Example: `bluefin` | Container image name. | | `forge_container_tag` | str | Evaluates to: `YYY-MM-DD_HHMMSS` Example: `2024-05-26_192206` | Container image tag. | | `forge_container_file` | str | Containerfile | Path to the Containerfile for Podman to build | | `forge_container_format` | str | oci | Format of the image Podman will build. Can be either `oci` or `docker` | | `forge_container_extra_args` | list | [] | List of extra arguments which gets passed to the podman build process. Example: `[--build-arg="BASE_IMAGE_NAME=silverblue"]` | | `forge_git_repository_url` | str | | Git repository url | | `forge_git_repository_destination` | str | | Git destination where repository is cloned to. | | `forge_git_repository_version` | str | main | Git repository branch or tag or commit version | | `forge_registry_url` | str | registry.ublue.local | Container registry url |