code: def wait_for_web_available(self):
          
          try:
              if not wait_for_service_available(
                      self._get_container_name('web'),
                      self.web_address(),
                      WEB_START_TIMEOUT_SECONDS):
                  raise DatacatsError('Error while starting web container:\n' +
                                      container_logs(self._get_container_name('web'), "all",
                                                     False, None))
          except ServiceTimeout:
              raise DatacatsError('Timeout while starting web container. Logs:' +
                                  container_logs(self._get_container_name('web'), "all", False, None))
docs: Wait for the web server to become available or raise DatacatsError
          if it fails to start.