added new cron role with job to update warhammer rss feed nightly

roles/cron/files/update_warhammer_feed.sh

@@ -0,0 +1,15 @@
+#!/bin/bash
+
+# Create and navigate to a temporary directory
+TMP_DIR="/tmp/warhammer_feed"
+mkdir -p "$TMP_DIR"
+cd "$TMP_DIR" || exit 1
+
+# Run the Docker command to generate the RSS feed
+docker run --rm -v "$TMP_DIR":/app/output git.thesatelliteoflove.com/phil/rss-warhammer
+
+# Copy the generated file to the desired location
+cp "$TMP_DIR/warhammer_rss_feed.xml" /opt/stacks/caddy/site/tsol/feeds
+
+# Restart the Docker stack
+docker compose -f /opt/stacks/glance/compose.yml restart