feat: Add simplified Dockerfile as backup option

- Add Dockerfile.simple with single-stage build
- Uses system Maven instead of Maven Wrapper
- Simpler and more reliable for environments with wrapper issues
- Can be used as fallback if Buildx build fails

Dockerfile.simple

@@ -0,0 +1,46 @@
+# 简化的单阶段构建
+FROM amazoncorretto:17-alpine
+
+# 安装Maven
+RUN apk add --no-cache maven
+
+# 设置工作目录
+WORKDIR /app
+
+# 复制所有源代码和Maven配置
+COPY . .
+
+# 给mvnw脚本添加执行权限（如果存在）
+RUN chmod +x mvnw || true
+
+# 构建应用（使用系统Maven，避免wrapper问题）
+RUN mvn clean package -DskipTests -B
+
+# 安装curl用于健康检查
+RUN apk add --no-cache curl tzdata
+
+# 设置时区
+ENV TZ=Asia/Shanghai
+RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone
+
+# 创建非root用户
+RUN addgroup -g 1000 spring && adduser -u 1000 -G spring -s /bin/sh -D spring
+
+# 创建应用目录和日志目录
+RUN mkdir -p /app/logs && chown -R spring:spring /app
+
+# 切换到非root用户
+USER spring
+
+# 暴露端口
+EXPOSE 8080
+
+# 健康检查
+HEALTHCHECK --interval=30s --timeout=3s --start-period=60s --retries=3 \
+    CMD curl -f http://localhost:8080/api/health || exit 1
+
+# JVM调优参数
+ENV JAVA_OPTS="-server -Xms256m -Xmx512m -XX:+UseG1GC -XX:+UseContainerSupport -XX:MaxRAMPercentage=75.0"
+
+# 启动应用
+ENTRYPOINT ["sh", "-c", "java $JAVA_OPTS -Djava.security.egd=file:/dev/./urandom -jar target/*.jar"]