code: def add_volume(self, hostpath, contpath, options=None):
          '''Add a volume (bind-mount) to the docker run invocation
          '''
          if options is None:
              options = []
          self.volumes.append((hostpath, contpath, options)f add_volume(self, hostpath, contpath, options=None):
          '''Add a volume (bind-mount) to the docker run invocation
          '''
          if options is None:
              options = []
          self.volumes.append((hostpath, contpath, options))
docs: Add a volume (bind-mount) to the docker run invocation