Added file on jellyfin installation

arch-config/Dokumente/Server-setups/debian-jellyfin.md

@@ -0,0 +1,35 @@
+# Jellyfin
+
+*All commands assume being logged in as root user on the server unless noted otherwise.*  
+
+```bash
+apt install apt-transport-https lsb-release
+```
+
+```bash
+wget -O key https://repo.jellyfin.org/debian/jellyfin_team.gpg.key
+```
+
+```bash
+apt-key add key
+```
+
+```bash
+echo "deb [arch=$( dpkg --print-architecture )] https://repo.jellyfin.org/debian $( lsb_release -c -s ) main" | tee /etc/apt/sources.list.d/jellyfin.list
+```
+
+```bash
+apt update
+```
+
+```bash
+apt install jellyfin
+```
+
+Depending on the init system, different commands have to be used.  
+```bash
+service jellyfin status
+```
+```bash
+systemctl status jellyfin
+```