feat: Customize DB path for JCloud app (#619)

src/backend/langflow/lcserve.py

@@ -1,5 +1,13 @@
 # This file is used by lc-serve to load the mounted app and serve it.
 
+import os
+
+# Use the JCLOUD_WORKSPACE for db URL if it's provided by JCloud.
+if 'JCLOUD_WORKSPACE' in os.environ:
+    os.environ[
+        'LANGFLOW_DATABASE_URL'
+    ] = f"sqlite:///{os.environ['JCLOUD_WORKSPACE']}/langflow.db"
+
 from langflow.main import setup_app
 from langflow.utils.logger import configure