added app.py

app.py

@@ -0,0 +1,42 @@
+from fastapi import FastAPI, HTTPException
+from fastapi.middleware.cors import CORSMiddleware
+import uvicorn
+import nest_asyncio
+from pydantic import BaseModel, Field
+import json
+import pandas as pd
+from simple_salesforce import Salesforce
+from langchain.chains.question_answering import load_qa_chain
+from langchain.llms import OpenAI
+from langchain.prompts import PromptTemplate
+from langchain.memory import ConversationBufferMemory
+from langchain.chat_models import ChatOpenAI
+from langchain.chains import RetrievalQA
+from langchain.embeddings.openai import OpenAIEmbeddings
+from langchain.vectorstores import FAISS
+from langchain.document_loaders import DataFrameLoader
+import os
+
+
+app = FastAPI()
+
+origins = ["*"]
+
+app.add_middleware(
+    CORSMiddleware,
+    allow_origins=origins,
+    allow_credentials=True,
+    allow_methods=["*"],
+    allow_headers=["*"],
+)
+    
+@app.get('/')
+def index():
+    return """KnowBot Server running with Salesforce Knowledge Article Data with Generative AI.
+              Architect : Soumyabrata Das (https://www.linkedin.com/in/soumyabrata-das-b0567b17)
+              """
+
+if __name__ == '__main__':
+    #nest_asyncio.apply()
+    #uvicorn.run("app:app",host='localhost', port=5000, reload=True)
+    uvicorn.run(app,host='0.0.0.0', port=5000)