# syntax=docker/dockerfile:1
FROM maven:3.9-eclipse-temurin-17 AS build
WORKDIR /app

# settings.xml 加速 Maven 下载，放在 cache mount 外部避免被清掉
COPY settings.xml /root/.m2/settings.xml
COPY pom.xml .
# --mount=type=cache 将 .m2/repository 持久化，后续构建复用已下载的依赖
RUN --mount=type=cache,target=/root/.m2/repository mvn dependency:go-offline -B -q

COPY src ./src
RUN --mount=type=cache,target=/root/.m2/repository mvn package -DskipTests -B -q

FROM eclipse-temurin:17-jre
WORKDIR /app
COPY --from=build /app/target/*.jar app.jar
EXPOSE 8080
ENTRYPOINT ["java", "-jar", "app.jar"]