Update required tools' links

README.md

@@ -47,7 +47,10 @@ Browse to http://localhost:3001 after starting.
 
 ### 💪🏻 Non-Docker
 
-Required Tools: Node.js >= 14, git and pm2.
+Required Tools: 
+- [Node.js](https://nodejs.org/en/download/) >= 14
+- [Git](https://git-scm.com/downloads) 
+- [pm2](https://pm2.keymetrics.io/) - For run in background
 
 ```bash
 # Update your npm to the latest version
@@ -67,11 +70,19 @@ npm install pm2 -g && pm2 install pm2-logrotate
 # Start Server
 pm2 start server/server.js --name uptime-kuma
 
+
+```
+Browse to http://localhost:3001 after starting.
+
+More useful PM2 Commands
+
+```bash
 # If you want to see the current console output
 pm2 monit
-```
 
-Browse to http://localhost:3001 after starting.
+# If you want to add it to startup
+pm2 save && pm2 startup
+```
 
 ### Advanced Installation