curl -fsSL https://repo.jellyfin.org/jellyfin_team.gpg.key | gpg --dearmor -o /usr/share/keyrings/jellyfin.gpg && echo "deb [signed-by=/usr/share/keyrings/jellyfin.gpg] https://repo.jellyfin.org/debian bookworm main" | tee /etc/apt/sources.list.d/jellyfin.list && apt update && apt install -y jellyfin

Start the Service:

systemctl enable --now jellyfin

/etc/nginx/sites-available/jellyfin
----------------------------------------------
server {
    listen 80;
    listen [::]:80;
    server_name jellyfin.marlons-archive.org;

    location / {
        return 301 https://$host$request_uri;
    }
}

server {
    listen 443 ssl;
    listen [::]:443 ssl;
    server_name jellyfin.marlons-archive.org;

    ssl_certificate /etc/letsencrypt/live/marlons-archive.org/fullchain.pem;
    ssl_certificate_key /etc/letsencrypt/live/marlons-archive.org/privkey.pem;
    include /etc/letsencrypt/options-ssl-nginx.conf;
    ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem;

    location / {
        proxy_pass http://127.0.0.1:8096;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;

        # WebSocket support
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
    }
}
----------------------------------------------
nginx -t && systemctl reload nginx

Visit your server IP at 8096 http://<DEINE-SERVER-IP>:8096 and create a admin user and go trough the setup-wizard.

🎉 FINISH you can now enjoy streaming on your website with your own Jellyfin Instance.