docs: create 3.0.0-alpha.12 docs

website/versioned_docs/version-3.0.0-alpha.12/admin-manual/tutorials/setup-a-firewall-using-ufw.md

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+---
+title: How to setup a firewall using UFW
+---
+
+This tutorials will walk you though the steps required to setup a firewall using [UFW](https://doc.ubuntu-fr.org/ufw).
+
+## 1. Install and enable `UFW`
+
+First you need to make sure UFW is installed and enabled:
+
+```bash
+sudo apt install ufw
+sudo ufw enable
+```
+
+## 2. Configure allowed ports
+
+Next, you need to configure the firewall allowed ports:
+
+```bash
+sudo ufw allow 22,80,8000/tcp
+```
+
+If you plan to use the live stream input endpoint, be sure to open the `8001` and `8002` ports:
+
+```bash
+sudo ufw allow 8001,8002/tcp
+```