Offer a way to sync time at boot in the first boot version of configure-stormux.

pi4/files/etc/systemd/system/time_sync_at_boot.service

@@ -0,0 +1,11 @@
+[Unit]
+Description=Update system time from worldtimeapi.org
+After=network-online.target
+Wants=network-online.target
+
+[Service]
+Type=oneshot
+ExecStart=/usr/local/bin/sync_time.sh
+
+[Install]
+WantedBy=multi-user.target

pi4/files/usr/local/bin/configure-stormux

@@ -101,6 +101,17 @@ if ping -qc1 -W 1 stormux.org &> /dev/null; then
     echo "Current date and time: $date_time"
     # set date and time
     date -s "$date_time"
+    echo "If your Pi does not have a CMOS battery and is powered off regularly, it may take a while for the time to be set correctly after boot."
+    echo "Stormux provides a service to sync the time after internet connection is established."
+    read -rp "Would you like the time to sync as soon as the Pi connects to the internet? " answer
+    answer="${answer:0:1}"
+    if [[ "${answer,,}" == "y" ]]; then
+        systemctl enable time_sync_at_boot.service
+    else
+       echo "Time sync at boot skipped."
+       echo "If you change your mind later, simply type:"
+       echo "sudo systemctl enable time_sync_at_boot.service"
+    fi
     set_timezone
 else
     echo "Please connect to the internet and run ${0##*/} again."

pi4/files/usr/local/bin/sync_time.sh

@@ -0,0 +1,4 @@
+#!/usr/bin/env bash
+
+date_time=$(curl -s http://worldtimeapi.org/api/ip | grep -oP '(?<="datetime":")[^"]*')
+date -s "$date_time"