Begin Hnefatafl from the game kit

deploy/setup-server.sh

@@ -0,0 +1,25 @@
+#!/usr/bin/env bash
+# Adds the game server to a droplet that setup-droplet.sh already prepared.
+# Copy this script and Caddyfile.tmpl to the droplet and run ON the droplet
+# as root; safe to run again. Installs Node 22, creates the service user and
+# data directory, and teaches Caddy to hand /api and /ws to the server while
+# it keeps serving the static site itself.
+set -euo pipefail
+
+if ! command -v node >/dev/null || [[ "$(node -v)" != v22* ]]; then
+  curl -fsSL https://deb.nodesource.com/setup_22.x | bash -
+  apt-get install -qy nodejs
+fi
+
+id -u hnefatafl &>/dev/null || useradd -r -m -d /opt/hnefatafl-home hnefatafl
+mkdir -p /opt/hnefatafl/app /var/lib/hnefatafl/rooms
+chown -R hnefatafl:hnefatafl /var/lib/hnefatafl
+
+# Caddy: rewrite the site's configuration from the template, keeping its
+# address line, so the game server's paths are routed before the files.
+HOST_LINE=$(head -1 /etc/caddy/Caddyfile)
+sed "s|__HOST__|$HOST_LINE|" "$(dirname "$0")/Caddyfile.tmpl" > /etc/caddy/Caddyfile
+caddy validate --config /etc/caddy/Caddyfile
+systemctl reload caddy
+
+echo "server prerequisites ready: now run deploy/deploy.sh <ip> from your machine"