增加流量不重置功能，ping改为tcpping

springboot-backend/Dockerfile

@@ -1,21 +1,23 @@
 # 构建阶段
-FROM maven:3.8.6-jdk-8 AS build
+FROM maven:3.9.6-openjdk-21 AS build
 WORKDIR /app
 COPY pom.xml .
 COPY src ./src
 RUN mvn clean package -DskipTests
 
 # 运行阶段
-FROM openjdk:8-jre-alpine
+FROM openjdk:21-jre-slim
 WORKDIR /app
 ENV JAVA_OPTS="-Xmx512m -Xms256m -Dfile.encoding=UTF-8 -Duser.timezone=Asia/Shanghai"
 ENV LANG=en_US.UTF-8
 ENV LANGUAGE=en_US:en
 ENV LC_ALL=en_US.UTF-8
 
-RUN sed -i 's/dl-cdn.alpinelinux.org/mirrors.ustc.edu.cn/g' /etc/apk/repositories \
-    && apk update \
-    && apk --no-cache add ttf-dejavu fontconfig
+RUN sed -i 's/deb.debian.org/mirrors.ustc.edu.cn/g' /etc/apt/sources.list.d/debian.sources \
+    && apt-get update \
+    && apt-get install -y --no-install-recommends fontconfig fonts-dejavu \
+    && apt-get clean \
+    && rm -rf /var/lib/apt/lists/*
 
 COPY --from=build /app/target/*.jar app.jar
 EXPOSE 6365