Add 9router start-on-boot setup (non-root, @reboot cron, no systemd)

install.sh

@@ -0,0 +1,32 @@
+#!/bin/sh
+# install.sh — set up 9router auto-start on boot (non-root, no systemd).
+# Run as root:  sudo ./install.sh
+set -e
+
+WRAPPER_SRC="./start-9router.sh"
+WRAPPER_DST="/usr/local/bin/start-9router.sh"
+LOG="/home/ardhi/9router.log"
+USER="ardhi"
+
+echo "==> Installing wrapper to $WRAPPER_DST"
+install -m 0755 "$WRAPPER_SRC" "$WRAPPER_DST"
+
+echo "==> Preparing log file ($LOG) owned by $USER"
+touch "$LOG"
+chown "$USER:$USER" "$LOG"
+chmod 644 "$LOG"
+
+echo "==> Registering @reboot cron as ROOT"
+# Must be root's crontab (wrapper uses runuser to drop privileges).
+( crontab -l 2>/dev/null | grep -v 'start-9router.sh'; echo "@reboot $WRAPPER_DST" ) | crontab -
+
+echo "==> Ensuring cron daemon is active"
+systemctl enable cron >/dev/null 2>&1 || true
+systemctl start cron >/dev/null 2>&1 || true
+
+echo "==> Disabling broken systemd unit (if any)"
+systemctl disable 9router >/dev/null 2>&1 || true
+
+echo "==> Done. Reboot to verify:"
+echo "      ss -ltnp | grep 20128"
+echo "      curl -s -o /dev/null -w '%{http_code}' http://127.0.0.1:20128/v1/models"