OS: allow set NTP (#252)

* OS: allow set NTP

* Create etc-systemd-timesyncd.conf.mount

* Update hassos-config

* Update configuration.md

* add link

* Update Documentation/configuration.md

Co-Authored-By: pvizeli <pascal.vizeli@syshack.ch>

buildroot-external/rootfs-overlay/etc/systemd/system/hassos-bind.target.wants/etc-systemd-timesyncd.conf.mount

@@ -0,0 +1 @@
+/usr/lib/systemd/system/etc-systemd-timesyncd.conf.mount

buildroot-external/rootfs-overlay/etc/tmpfiles.d/timesyncd.conf

@@ -0,0 +1 @@
+C /mnt/overlay/etc/systemd/timesyncd.conf - - - - /etc/systemd/timesyncd.conf

buildroot-external/rootfs-overlay/usr/lib/systemd/system/etc-systemd-timesyncd.conf.mount

@@ -0,0 +1,14 @@
+[Unit]
+Description=Timesyncd persistent configuration
+Requires=mnt-overlay.mount
+After=mnt-overlay.mount systemd-tmpfiles-setup.service
+Before=systemd-timesyncd.service
+
+[Mount]
+What=/mnt/overlay/etc/systemd/timesyncd.conf
+Where=/etc/systemd/timesyncd.conf
+Type=none
+Options=bind
+
+[Install]
+WantedBy=hassos-bind.target

buildroot-external/rootfs-overlay/usr/sbin/hassos-config

@@ -75,6 +75,15 @@ else
     systemctl stop dropbear > /dev/null 2>&1
 fi
 
+##
+# timesyncd
+if [ -f "${CONFIG_DIR}/timesyncd.conf" ]; then
+    echo "[Info] Update timesyncd config"
+
+    cat "${CONFIG_DIR}/timesyncd.conf" > /etc/systemd/timesyncd.conf
+    systemctl restart systemd-timesyncd.service > /dev/null 2>&1
+fi
+
 ##
 # Firmware update / Only USB
 UPTIME=$(awk '{printf "%0.f", $1}' /proc/uptime)