Add grav daily cron to check available update.

README.md

@@ -0,0 +1,7 @@
+
+* grav_cron_: A daily cron to check if [grav website][Grav] got available updates.
+  * It need to work from the Grav's root directory.
+	* If an update is available, it will create a empty file (${GRAV_ROOT}/logs/update), else it will ensure the "update" file is removed.
+
+
+[grav website]: https://getgrav.org/

grav_cron

@@ -0,0 +1,19 @@
+#!/bin/sh
+
+GRAV_ROOT="/var/www/grav"
+GRAV_UPDATE_LOG="${GRAV_ROOT}/logs/update"
+
+# Need to work in the Grav root directory
+cd "${GRAV_ROOT}" || exit 1
+
+# Display the Grav's version and check if an update is available
+GRAV_UPDATE=$("${GRAV_ROOT}"/bin/gpm version|grep upgradable)
+
+# Verify if the variable contains something
+if [ -z "${GRAV_UPDATE}" ]; then
+  rm -f "${GRAV_UPDATE_LOG}"
+else
+  touch "${GRAV_UPDATE_LOG}"
+fi
+
+exit 0