Add project setup instructions for Flask

Author: spiralgang

venv/bin/activate/my-github-webhook

@@ -0,0 +1,10 @@
+# Create a new directory for your project
+mkdir my-github-webhook
+cd my-github-webhook
+
+# Create a virtual environment (recommended)
+python -m venv venv
+source venv/bin/activate  # On Windows, use `venv\Scripts\activate`
+
+# Install Flask
+pip install Flask