Update app.py

app.py

@@ -35,11 +35,9 @@ def create_vectorstore(splits):
     return retriever
 
 def summarize_document(docs, llm):
-    prompt = """
-    Write a concise summary of the following:
-
-    {context}
-    """
+    prompt = ChatPromptTemplate.from_messages(
+        [("system", "Write a concise summary of the following:\\n\\n{context}")]
+    )
     chain = create_stuff_documents_chain(llm, prompt)
     with get_openai_callback() as cb:  
       summary = chain.invoke({"context": docs})