[mirotalksfu] - update docs

docs/self-hosting.md

@@ -83,6 +83,8 @@ Using [PM2](https://pm2.keymetrics.io) to run it as daemon
 ```bash
 $ npm install -g pm2
 $ pm2 start app/src/Server.js
+$ pm2 save
+$ pm2 startup
 ```
 
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