1. `Invalid Reference Format`

    ```sh
    500 Server Error: Internal Server Error for url: http+docker://localunixsocket/v1.30/images
    500 Server Error: Internal Server Error ("invalid reference format")
    ```

    Solution: You likely installed Docker via `sudo apt install docker.io`. Use the proper steps for [CE here](https://docs.docker.com/engine/installation/linux/docker-ce/ubuntu/#install-docker-ce), or use the [convenience script](https://docs.docker.com/engine/installation/linux/docker-ce/ubuntu/#install-using-the-convenience-script).

2. `('Connection aborted.', error(2, 'No such file or directory'))`

    This means that you have likely do not have `DOCKER_HOST` Environment Variable set.

    ```sh
    ERROR: Could not login to Container Registry. Please verify your credentials in CONTAINER_REGISTRY_ environment variables.
    ```

    ```sh
    ('Connection aborted.', error(2, 'No such file or directory'))
    ERROR: Could not connect to docker daemon.
    ERROR: Docker is unavailable
    CRITICAL: IoT Edge dependency not available: docker