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Dockerfile
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# our base build image
FROM maven:3.5-jdk-8 as maven
WORKDIR /app
# copy the Project Object Model file
COPY ./pom.xml ./pom.xml
# fetch all dependencies
RUN mvn dependency:go-offline -B
# copy your other files
COPY ./src ./src
# build for release
# NOTE: my-project-* should be replaced with the proper prefix
RUN mvn package && cp target/*.jar app.jar
# smaller, final base image
FROM openjdk:8u171-jre-alpine
# OPTIONAL: copy dependencies so the thin jar won't need to re-download them
# COPY --from=maven /root/.m2 /root/.m2
# set deployment directory
WORKDIR /app
# copy over the built artifact from the maven image
COPY --from=maven /app/app.jar ./app.jar
# set the startup command to run your binary
CMD ["java", "-jar", "/app/app.jar"]