add temporary deploy

scripts/backup_db.sh

@@ -0,0 +1,27 @@
+#!/usr/bin/env sh
+set -eu
+
+PROJECT_ROOT=$(CDPATH= cd -- "$(dirname -- "$0")/.." && pwd)
+cd "$PROJECT_ROOT"
+
+if [ ! -f ".env" ] && [ -f ".env.example" ]; then
+  echo "未找到 .env，先从 .env.example 复制一份："
+  echo "  cp .env.example .env"
+  exit 1
+fi
+
+DATA_DIR_VALUE=$(grep '^DATA_DIR=' .env 2>/dev/null | tail -n 1 | cut -d '=' -f 2- || true)
+DATA_DIR=${DATA_DIR_VALUE:-./data}
+DB_PATH="$DATA_DIR/app.db"
+
+if [ ! -f "$DB_PATH" ]; then
+  echo "未找到数据库文件：$DB_PATH"
+  exit 1
+fi
+
+mkdir -p backups
+TIMESTAMP=$(date +"%Y%m%d-%H%M%S")
+DESTINATION="backups/app-$TIMESTAMP.db"
+
+cp "$DB_PATH" "$DESTINATION"
+echo "备份已创建：$DESTINATION"