Hi Arnaud I removed the custom ExecStart and attempted to restart docker. Here is the relevant output from journalctl:
Sep 08 19:04:37 life systemd[1]: Starting Docker Socket for the API. Sep 08 19:04:37 life systemd[1]: Listening on Docker Socket for the API. Sep 08 19:04:37 life systemd[1]: docker.service: Start request repeated too quickly. Sep 08 19:04:37 life systemd[1]: docker.service: Failed with result 'exit-code'. Sep 08 19:04:37 life systemd[1]: Failed to start Docker Application Container Engine. Sep 08 19:04:37 life systemd[1]: docker.socket: Failed with result 'service-start-limit-hit'.
0xCEC1B8C7E51FC983.asc
Description: application/pgp-keys
signature.asc
Description: OpenPGP digital signature