Add proper requirements

backend/app.py

@@ -97,8 +97,7 @@ def chat():
     return jsonify(reply=reply)
 
 
-import requests
-from bs4 import BeautifulSoup
+
 
 def extract_titles(urls):
     titles = []

backend/requirements.txt

@@ -1,11 +1,28 @@
+aiohttp==3.8.4
+aiosignal==1.3.1
+async-timeout==4.0.2
+attrs==23.1.0
+beautifulsoup4==4.12.2
 blinker==1.6.2
+certifi==2022.12.7
+charset-normalizer==3.1.0
 click==8.1.3
 Flask==2.3.1
 Flask-Cors==3.0.10
+frozenlist==1.3.3
+idna==3.4
 install==1.3.5
 itsdangerous==2.1.2
 Jinja2==3.1.2
 MarkupSafe==2.1.2
+multidict==6.0.4
+openai==0.27.6
 python-dotenv==1.0.0
+redis==4.5.4
+requests==2.30.0
 six==1.16.0
+soupsieve==2.4.1
+tqdm==4.65.0
+urllib3==2.0.2
 Werkzeug==2.3.1
+yarl==1.9.2