Add monitoring of scripts through healthchecks.io

Updates the README with more cron script setup instructions.

scripts/sync.sh

@@ -1,6 +1,44 @@
 #!/bin/bash
+set -e
+set -o pipefail
+
+# Load environment variables
 export $(grep -v '^#' .env | xargs -d '\n')
+
+# Generate UUID for this run
+RID=$(cat /proc/sys/kernel/random/uuid)
+
+# Healthchecks.io ping function
+ping_healthcheck() {
+    local endpoint="$1"
+    local data="$2"
+    if [ -n "$data" ]; then
+        curl -fsS -m 10 --retry 5 --data-raw "$data" "https://hc-ping.com/${HEALTHCHECK_PING_KEY}/modmapper-sync${endpoint}?rid=${RID}" >/dev/null || true
+    else
+        curl -fsS -m 10 --retry 5 "https://hc-ping.com/${HEALTHCHECK_PING_KEY}/modmapper-sync${endpoint}?rid=${RID}" >/dev/null || true
+    fi
+}
+
+# Send failure notification with logs
+send_failure() {
+    local logs=""
+    if [ -f logs/modmapper.log ]; then
+        logs=$(tail --bytes=100000 logs/modmapper.log)
+    fi
+    ping_healthcheck "/fail" "$logs"
+    exit 1
+}
+
+# Trap to catch failures
+trap send_failure ERR
+
+# Send start ping
+ping_healthcheck "/start"
+
 rclone sync --fast-list --checksum cells ${STATIC_SERVER_REMOTE}:${STATIC_SERVER_CELLS_BUCKET}
 rclone sync --fast-list --checksum mods ${STATIC_SERVER_REMOTE}:${STATIC_SERVER_MODS_BUCKET}
 rclone sync --fast-list --checksum plugins_data ${STATIC_SERVER_REMOTE}:${STATIC_SERVER_PLUGINS_BUCKET}
-rclone sync --fast-list --checksum files ${STATIC_SERVER_REMOTE}:${STATIC_SERVER_FILES_BUCKET}
+rclone sync --fast-list --checksum files ${STATIC_SERVER_REMOTE}:${STATIC_SERVER_FILES_BUCKET}
+
+# Send success ping
+ping_healthcheck ""