ci: align Dockerfile base images with mediabot (use Harbor maven-java21 + eclipse-temurin)

par-api/Dockerfile

@@ -11,7 +11,8 @@ COPY web/ .
 RUN npm run build
 
 # 第二阶段：构建后端
-FROM registry.cn-hangzhou.aliyuncs.com/library/eclipse-temurin:21-jdk-alpine AS server-builder
+# mediabot 使用 maven-java21 镜像（已含 JDK + Maven）
+FROM 192.168.31.253/library/maven-java21:3.9.9-alpine AS server-builder
 
 WORKDIR /build
 
@@ -22,8 +23,7 @@ COPY par-core/pom.xml par-core/
 COPY par-api/pom.xml par-api/
 
 # 下载依赖（缓存层）
-RUN apk add --no-cache maven && \
-    mvn dependency:go-offline -B
+RUN mvn dependency:go-offline -B
 
 # 复制源码并构建
 COPY par-common/src par-common/src
@@ -38,7 +38,7 @@ RUN mvn clean package -DskipTests -B && \
     cp par-api/target/*.jar target/app.jar
 
 # 第三阶段：运行
-FROM registry.cn-hangzhou.aliyuncs.com/library/eclipse-temurin:21-jre-alpine
+FROM 192.168.31.253/library/eclipse-temurin:21-jre-alpine
 
 LABEL maintainer="PAR Team"
 LABEL description="PT Adapter Registry Server"