Add env var

src/backend/base/langflow/main.py

@@ -151,15 +151,15 @@ def create_app():
     from langflow.utils.version import get_version_info
 
     __version__ = get_version_info()["version"]
-    root_path = os.environ.get("LANGFLOW_ROOT_PATH", "")
+    settings = get_settings_service().settings
 
     configure()
     lifespan = get_lifespan(version=__version__)
     app = FastAPI(
         lifespan=lifespan,
         title="Langflow",
         version=__version__,
-        root_path=root_path
+        root_path=settings.root_path
     )
 
     app.add_middleware(
@@ -223,7 +223,6 @@ async def flatten_query_string_lists(request: Request, call_next):
 
         return await call_next(request)
 
-    settings = get_settings_service().settings
     if prome_port_str := os.environ.get("LANGFLOW_PROMETHEUS_PORT"):
         # set here for create_app() entry point
         prome_port = int(prome_port_str)

src/backend/base/langflow/services/settings/base.py

@@ -195,6 +195,9 @@ class Settings(BaseSettings):
     """The maximum number of vertex builds to keep in the database."""
     max_vertex_builds_per_vertex: int = 2
     """The maximum number of builds to keep per vertex. Older builds will be deleted."""
+    root_path: str = ""
+    """The root path to serve requests at."""
+
 
     # MCP Server
     mcp_server_enabled: bool = True