InvoiceShelf: run the Laravel scheduler (#18079)

Without the schedule:run cron job, recurring invoices and other scheduled tasks never ran (#18072). Update adds it to existing installs.

ct/invoiceshelf.sh

@@ -31,6 +31,14 @@ function update_script() {
     exit
   fi
 
+  if [[ ! -f /etc/cron.d/invoiceshelf ]]; then
+    msg_info "Adding the Laravel scheduler"
+    cat <<'EOF' >/etc/cron.d/invoiceshelf
+* * * * * www-data cd /opt/invoiceshelf && php artisan schedule:run >> /dev/null 2>&1
+EOF
+    msg_ok "Added the Laravel scheduler"
+  fi
+
   if check_for_gh_release "invoiceshelf" "InvoiceShelf/InvoiceShelf"; then
     msg_info "Stopping Services"
     systemctl stop caddy

install/invoiceshelf-install.sh

@@ -52,6 +52,9 @@ chown -R www-data:www-data /opt/invoiceshelf
 chmod -R 775 storage bootstrap/cache
 $STD php artisan migrate --force
 $STD php artisan storage:link
+cat <<'EOF' >/etc/cron.d/invoiceshelf
+* * * * * www-data cd /opt/invoiceshelf && php artisan schedule:run >> /dev/null 2>&1
+EOF
 msg_ok "Set up InvoiceShelf"
 
 msg_info "Configuring Caddy"