Fix new style config

libs/cli/langgraph_cli/config.py

@@ -443,9 +443,13 @@ def _parse_node_version(version_str: str) -> int:
         ) from None
 
 
-def _is_python_graph(spec: str) -> bool:
+def _is_python_graph(spec: str | dict) -> bool:
     """Check if a graph is a Python graph based on the file extension."""
 
+    # handle new style config
+    if isinstance(spec, dict):
+        spec = spec.get("path")
+
     file_path = spec.split(":")[0]
     file_ext = os.path.splitext(file_path)[1]
     return file_ext in [".py", ".pyx", ".pyd", ".pyi"]

libs/cli/tests/unit_tests/cli/test_cli.py

@@ -178,8 +178,9 @@ def test_dockerfile_command_basic() -> None:
     """Test the 'dockerfile' command with basic configuration."""
     runner = CliRunner()
     config_content = {
-        "node_version": "20",  # Add any other necessary configuration fields
+        "python_version": "3.11",
         "graphs": {"agent": "agent.py:graph"},
+        "dependencies": ["."],
     }
 
     with temporary_config_folder(config_content) as temp_dir: