$ docker run --rm -e APP_KEY=... -p 8000:8000 -v mydata_dir:/app/data gcr.io/atomicptr/nimbus:latest

# next use docker ps to find this container id
$ docker ps
CONTAINER ID      IMAGE           COMMAND                  CREATED         STATUS                   PORTS      NAMES
MY_CONTAINER_ID   nimbus:latest   "docker-php-entrypoi…"   2 minutes ago   Up 2 minutes (healthy)   ........   .........

# next we apply the migrations for the database
$ docker exec -it MY_CONTAINER_ID php artisan migrate

# next we run tinker to create our admin account
$ docker exec -it MY_CONTAINER_ID php artisan tinker
> $user = new App\Models\User;
> $user->email = 'admin@example.com';
> $user->name = "Admin Adminsson";
> $user->password = Hash::make('password');
> $user->save();