Update requirements.txt

requirements.txt

@@ -1,6 +1,15 @@
-Flask==3.0.3
-Flask-SocketIO==5.3.0
-google-generativeai==0.7.0
-python-dotenv==1.0.1
-eventlet==0.36.1
-gunicorn==22.0.0
+# --- core web app ---
+flask>=3.0
+gunicorn>=22.0          # production WSGI server recommended by Render
+
+# --- computer‑vision utilities ---
+opencv-python-headless>=4.10.0.0   # OpenCV without GUI libs
+
+# --- Gemini / LangChain ---
+langchain-core>=0.2.0
+langchain-google-genai>=0.0.12     # wrapper for Google Generative AI
+google-generativeai>=0.5.3         # underlying Gemini client SDK
+
+# --- other runtime helpers ---
+requests>=2.32
+python-dotenv>=1.0                  # convenient for local .env testing (optional)