# Use the official maven/Java 11 image to create a build artifact.

# https://hub.docker.com/_/maven

FROM maven:3-jdk-11-slim AS build-env

# Set the working directory to /app

WORKDIR /app

# Copy the pom.xml file to download dependencies

COPY pom.xml ./

# Copy local code to the container image.

COPY src ./src

# Download dependencies and build a release artifact.

RUN mvn package -DskipTests

# Use OpenJDK for base image.

# https://hub.docker.com/_/openjdk

# https://docs.docker.com/develop/develop-images/multistage-build/#use-multi-stage-builds

FROM openjdk:11.0.16-jre-slim

# Copy the jar to the production image from the builder stage.

COPY --from=build-env /app/target/hello-world-*.jar /hello-world.jar

# Run the web service on container startup.

CMD ["java", "-jar", "/hello-world.jar"]