let the app choose os.environ["GRADIO_SERVER_PORT"] = "7861-7870"

app.py

@@ -12,9 +12,12 @@ from langchain_core.output_parsers import StrOutputParser
 import tempfile
 import nest_asyncio
 
+os.environ["GRADIO_SERVER_PORT"] = "7861-7870"
+
 # Apply nest_asyncio
 nest_asyncio.apply()
 
+
 # Constants
 LLM_MODEL = "gemini-1.5-flash"
 EMBEDDING_MODEL = "BAAI/bge-large-en-v1.5"
@@ -153,4 +156,4 @@ with gr.Blocks(title="PDF Chatbot") as demo:
         outputs=[chat_row, file_upload_input]
     )
 
-demo.launch(server_port=7861)
+demo.launch()