feat(cli): add debugger host CLI flag to specify default base URL (#900)

libs/cli/tests/unit_tests/test_cli.py

@@ -20,6 +20,7 @@ def test_prepare_args_and_stdin():
     )
     port = 8000
     debugger_port = 8001
+    debugger_graph_url = f"http://127.0.0.1:{port}"
 
     actual_args, actual_stdin = prepare_args_and_stdin(
         capabilities=DEFAULT_DOCKER_CAPABILITIES,
@@ -28,6 +29,7 @@ def test_prepare_args_and_stdin():
         docker_compose="custom-docker-compose.yml",
         port=port,
         debugger_port=debugger_port,
+        debugger_base_url=debugger_graph_url,
         watch=True,
     )
 
@@ -63,11 +65,13 @@ services:
     langgraph-debugger:
         image: langchain/langgraph-debugger
         restart: on-failure
-        ports:
-            - "{debugger_port}:3968"
         depends_on:
             langgraph-postgres:
                 condition: service_healthy
+        ports:
+            - "{debugger_port}:3968"
+        environment:
+            VITE_STUDIO_LOCAL_GRAPH_URL: {debugger_graph_url}
     langgraph-api:
         ports:
             - "8000:8000"