修复编译错误

springboot-backend/Dockerfile

@@ -6,14 +6,15 @@ COPY src ./src
 RUN mvn clean package -DskipTests
 
 # 运行阶段
-FROM openjdk:21-jre-slim
+FROM eclipse-temurin:21-jre
 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/deb.debian.org/mirrors.ustc.edu.cn/g' /etc/apt/sources.list.d/debian.sources \
+RUN sed -i 's/archive.ubuntu.com/mirrors.ustc.edu.cn/g' /etc/apt/sources.list \
+    && sed -i 's/security.ubuntu.com/mirrors.ustc.edu.cn/g' /etc/apt/sources.list \
     && apt-get update \
     && apt-get install -y --no-install-recommends fontconfig fonts-dejavu \
     && apt-get clean \