19 lines
603 B
Docker
19 lines
603 B
Docker
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# Build stage: uses Maven + JDK 17 (Alpine) to compile and package the application.
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FROM maven:3.9-eclipse-temurin-17-alpine AS builder
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WORKDIR /app
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# Copy pom.xml first to leverage Docker layer caching for dependency downloads.
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COPY pom.xml .
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RUN mvn dependency:go-offline -q
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# Copy source and build the fat JAR, skipping tests.
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COPY src ./src
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RUN mvn clean package -DskipTests -q
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# Runtime stage: slim JRE-only image for a smaller production footprint.
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FROM eclipse-temurin:17-jre-alpine
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WORKDIR /app
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COPY --from=builder /app/target/*.jar app.jar
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EXPOSE 8080
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ENTRYPOINT ["java", "-jar", "app.jar"]
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