Add backup script, fix Caddy routing

backup.sh

@@ -0,0 +1,27 @@
+#!/bin/bash
+# Backup script for /opt/infra
+# Run daily via cron
+
+BACKUP_DIR=/opt/backups
+RETENTION_DAYS=7
+TIMESTAMP=$(date +%Y%m%d_%H%M%S)
+BACKUP_FILE="$BACKUP_DIR/infra_backup_$TIMESTAMP.tar.gz"
+
+mkdir -p "$BACKUP_DIR"
+
+# Create backup
+tar -czf "$BACKUP_FILE" -C /opt infra 2>/dev/null
+
+# Backup Docker volumes
+for vol in infra_caddy_data infra_caddy_config infra_gitea_data infra_gitea_config infra_uptime_kuma_data; do
+    vol_path=$(sudo docker volume inspect $vol --format '{{.Mountpoint}}' 2>/dev/null)
+    if [ -n "$vol_path" ] && [ -d "$vol_path" ]; then
+        vol_backup="$BACKUP_DIR/${vol}_${TIMESTAMP}.tar.gz"
+        sudo tar -czf "$vol_backup" -C "$vol_path" . 2>/dev/null
+    fi
+done
+
+# Cleanup old backups
+find "$BACKUP_DIR" -name "*.tar.gz" -mtime +$RETENTION_DAYS -delete 2>/dev/null
+
+echo "Backup completed: $BACKUP_DIR ($(du -sh $BACKUP_DIR | cut -f1))"