M2.7: Host Game, backups, launchd/systemd samples, hosting and Tailscale guide

server/emberwild-server.service

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+# Emberwild dedicated server as a systemd service (Linux).
+#
+# 1. Put the game where it'll live, e.g. /opt/emberwild (a git clone), and
+#    install Godot 4.7+ as /usr/local/bin/godot.
+# 2. Make a user for it:     sudo useradd -r -m -d /var/lib/emberwild emberwild
+# 3. Copy this file:         sudo cp server/emberwild-server.service /etc/systemd/system/
+#    and edit User, WorkingDirectory and GODOT below if yours differ.
+# 4. Start it, and on boot:  sudo systemctl enable --now emberwild-server
+#    Logs:                   journalctl -u emberwild-server -f
+#    Stop / restart:         sudo systemctl stop|restart emberwild-server
+#
+# server.json and the world live in the user's Godot data folder:
+#   /var/lib/emberwild/.local/share/godot/app_userdata/Emberwild/server/
+# Admin commands: join the game and use chat (/help), or edit server.json and
+# restart. (The console needs a terminal, so it isn't used here.)
+
+[Unit]
+Description=Emberwild dedicated server
+After=network-online.target
+Wants=network-online.target
+
+[Service]
+Type=simple
+User=emberwild
+WorkingDirectory=/opt/emberwild
+Environment=GODOT=/usr/local/bin/godot
+# run_server.sh checks the Godot version and imports a fresh copy first.
+ExecStart=/opt/emberwild/server/run_server.sh
+Restart=on-failure
+RestartSec=10
+# The world saves within 10 s of any change, so a stop loses at most that.
+KillSignal=SIGINT
+TimeoutStopSec=20
+
+[Install]
+WantedBy=multi-user.target