deploy: version systemd runtime setup

README.md

@@ -51,6 +51,26 @@ This tutorial will be showing how to install in both FreeBSD and Windows environ
 
 <br>
 
+## Debian (systemd)
+
+For the Debian runtime used in production, the repository now also contains versioned `systemd` deployment files under [deploy/systemd](deploy/systemd/README.md).
+
+Example installation:
+
+```bash
+python3 deploy/systemd/install_systemd.py \
+  --user mt2.jakubkadlec.dev \
+  --group mt2.jakubkadlec.dev \
+  --runtime-root /home/mt2.jakubkadlec.dev/metin/runtime/server \
+  --channel 1 \
+  --channel 99 \
+  --restart
+```
+
+This installs the stack units, direct game/db launch helpers and a DB readiness gate so `auth` and `game` do not start before the DB socket is listening.
+
+<br>
+
 ## ![FreeBSD](https://metin2.download/picture/36rMX2LFRT3U8qlPNQ81nsPZ7F4yg4c3/.png) **FreeBSD**
 
 ### ⬇️ Obtaining the Serverfiles
@@ -773,4 +793,4 @@ After finishing this part, you should now have knowledge of:
 ## Next steps
 After following either the **FreeBSD** method or the **Windows** method, you should be ready to proceed to cloning, building and distributing the [Client Source project](https://github.com/d1str4ught/m2dev-client-src)
 
-⭐ **NEW**: We are now on Discord, feel free to [check us out](https://discord.gg/ETnBChu2Ca)!
+⭐ **NEW**: We are now on Discord, feel free to [check us out](https://discord.gg/ETnBChu2Ca)!