docs: def generate_docker_run(self):
          """ Generate a sample docker run
          """
          example = []
          example.append("docker run -it")
          for key in sorted(list(self.spec.keys())):
              if self.spec[key]['type'] in (dict, list):
                  value = f"\'{json.dumps(self.spec[key].get('example', ''))}\'"
              else:
                  value = f"{self.spec[key].get('example', '')}"
              string = f"     -e {self.env_prefix}_{key.upper()}={value}"
              example.append(string)
          example.append("     <container-name>")
          print(" \\\n".join(example))