bugfix setup

app.py

@@ -21,10 +21,11 @@ def get_api_key(input_1, input_2):
     return True
 
 def setup_chain():
-    global embeddings, docsearch, chain
+    global embeddings, docsearch, chain, setup_complete
     embeddings = OpenAIEmbeddings()
     docsearch = Chroma.from_texts(texts, embeddings, metadatas=[{"source": str(i)} for i in range(len(texts))]).as_retriever()
     chain = load_qa_chain(OpenAI(temperature=0), chain_type="stuff")
+    setup_complete = True
 
 def make_inference(query):
     if not setup_complete: