Changing path check to allow something that is path like, as the container may not exist local to the local node

Author: bryce-turner

src/jetstream/backends/slurm_singularity.py

@@ -211,7 +211,7 @@ async def spawn(self, task):
             singularity_hostname = None
             docker_authentication_token = None
         else:
-            if os.path.exists(container) or os.PathLike(container):
+            if os.path.exists(container) or container.startswith("/"):
                 singularity_image = container
                 singularity_hostname = None
                 docker_authentication_token = None