Add script to Update v2 to v3

UPDATE-v2-to-v3.sh

@@ -0,0 +1,24 @@
+echo "============="
+echo "Updating Node.js to version 16..."
+wget https://deb.nodesource.com/setup_16.x
+chmod +x setup_16.x
+./setup_16.x
+apt install nodejs -y
+apt install node-pre-gyp -y
+rm setup_16.x
+npm i npm -g
+
+echo "============="
+echo "Updating PM2..."
+npm install pm2@latest -g
+
+echo "============="
+echo "Updating Shinobi dependencies..."
+git reset --hard
+git pull
+rm -rf node_modules
+npm install
+
+echo "============="
+echo "Restarting PM2..."
+pm2 update