Initial commit: YouTube Sync Docker container

- Alpine-based Docker image with yt-dlp
- Configurable channel sync script
- Unraid template for Community Applications
- Automatic scheduling via cron
- Emby/Plex/Jellyfin compatible output structure

entrypoint.sh

@@ -0,0 +1,56 @@
+#!/bin/bash
+# Entrypoint script for YouTube Sync Docker container
+
+set -e
+
+echo "=========================================="
+echo "YouTube Channel Sync Docker"
+echo "=========================================="
+echo "Download Directory: $DOWNLOAD_DIR"
+echo "Config Directory: $CONFIG_DIR"
+echo "Sync Schedule: $SYNC_SCHEDULE"
+echo "Max Quality: ${MAX_QUALITY}p"
+echo "Sleep Interval: ${SLEEP_INTERVAL}s"
+echo "Timezone: $TZ"
+echo "=========================================="
+
+# Create example channels file if it doesn't exist
+if [ ! -f "$CONFIG_DIR/channels.txt" ]; then
+    echo "[INFO] Creating example channels.txt..."
+    cat > "$CONFIG_DIR/channels.txt" << 'EOF'
+# YouTube Channel Configuration
+# Format: CHANNEL_ID|Channel Name
+# One channel per line. Lines starting with # are ignored.
+#
+# Examples:
+# UCfDNi1aEljAQ17mUrfUjkvg|Alton Brown
+# UCoq2qlWgvvKJzW_hBkLIE8w|Flavour Trip
+#
+# To find a channel ID:
+# 1. Go to the channel's main page
+# 2. View page source (Ctrl+U or Cmd+U)
+# 3. Search for "channelId" or look in the URL
+EOF
+fi
+
+# Set up cron job if SYNC_SCHEDULE is provided
+if [ "$SYNC_SCHEDULE" != "manual" ]; then
+    echo "[INFO] Setting up cron schedule: $SYNC_SCHEDULE"
+    echo "$SYNC_SCHEDULE /app/sync.sh >> /var/log/youtube-sync.log 2>&1" > /etc/crontabs/root
+
+    # Start crond in the background
+    crond -f -l 2 &
+    CRON_PID=$!
+    echo "[INFO] Cron daemon started (PID: $CRON_PID)"
+
+    # Run initial sync
+    echo "[INFO] Running initial sync..."
+    /app/sync.sh || true
+
+    # Keep container running and monitor cron
+    echo "[INFO] Container ready. Watching for scheduled syncs..."
+    wait $CRON_PID
+else
+    echo "[INFO] Manual mode enabled. Running sync once..."
+    /app/sync.sh
+fi