setup.sh having commands for setting up Python 3.9 env - new addition

setup.sh file having commands for setting up Python 3.9 env for running reviews.py  having get-reviews & post-reviews endpoints

Author: Sklup55

functions/setup.sh

@@ -0,0 +1,14 @@
+#!/bin/bash
+
+# Install Python 3.9
+sudo apt-get update
+sudo apt-get install -y python3.9 python3.9-distutils
+
+# Upgrade pip
+/usr/bin/python3.9 -m pip install --upgrade pip
+
+# Install Cloudant
+/usr/bin/python3.9 -m pip install Cloudant
+
+# Install Flask
+/usr/bin/python3.9 -m pip install Flask