Add option to define update hour

install.sh

@@ -3,18 +3,18 @@
 cd "$(dirname "${BASH_SOURCE[0]}")" || exit 1
 
 [[ -f .env ]] && source .env
-[[ -z $topic ]] && { echo -n "Enter your topic for https://ntfy.sh: "; read -r topic; }
-
-CRONJOB="0 22 * * * /etc/upgrade.sh >/dev/null 2>&1"
+[[ -z $topic ]] && read -rp "Enter your topic for https://ntfy.sh: " topic
 
 cp -fv src/upgrade.sh /etc/upgrade.sh
 sed -i "s/REPLACE_TOPIC/$topic/g" /etc/upgrade.sh
 chmod +x /etc/upgrade.sh
 
+read -rp "At what hour do you want the update to occur (enter value in 24 hour format, e.g. '21'): " hour
+CRONJOB="0 $hour * * * /etc/upgrade.sh >/dev/null 2>&1"
+
 if ! crontab -u root -l | grep -Fq "$CRONJOB"; then
     echo "We're going to run unattended-upgrades via a cronjob instead of systemd."
-    echo -n "Please choose 'no' on the next prompt. Press enter when you're ready"
-    read -r
+    read -rp "Please choose 'no' on the next prompt. Press enter when you're ready."
 
     dpkg-reconfigure unattended-upgrades