Add instructions for creating and using a self-signed SSL certificate in README.md

README.md

@@ -28,3 +28,17 @@ Copy the `app.py` file to your desired location, and run it using Python:
 ```bash
 flask run app.py
 ```
+
+## Self-Signed SSL Certificate (Optional)
+
+To run the Flask app with HTTPS, you can create a self-signed SSL certificate:
+
+```bash
+openssl req -x509 -newkey rsa:4096 -keyout key.pem -out cert.pem -days 365 -nodes -subj "/CN=localhost" -addext "subjectAltName=DNS:localhost"
+```
+
+Then run the Flask app with SSL context:
+
+```bash
+flask run --cert=cert.pem --key=key.pem
+```