using the docker provider with terraform cloud throws "Cannot connect to the Docker daemon at unix:///var/run/docker.sock"

Question

Where the pipelines run I do not have access to the underlying environment, I'm guessing the issue stems from attempting to use that provider at all with terraform? provider:

terraform {
  cloud {
    organization = "myorg"
    workspaces {
      tags = ["main"]
    }
  }

  required_providers {
    google = {
      source  = "hashicorp/google"
      version = ">= 4.39.0"
    }

    docker = {
      source  = "kreuzwerker/docker"
      version = "2.11.0"
    }
  }
}

data "google_client_config" "default" {}

provider "docker" {
  registry_auth {
    address  = "gcr.io"
    username = "oauth2accesstoken"
    password = data.google_client_config.default.access_token
  }
}

What's the expected process here? Is docker something that can't be used together with terraform cloud? Do I have to host a docker daemon somehow somehwere? I've been searching for any kind of examples/documentation/instruction.