Multistage Dockerfile to build and run a Java project

JavaMultiStage.Dockerfile

FROM maven:3.6-jdk-11 as builder
WORKDIR /app

COPY pom.xml .

# download dependencies as specified in pom.xml
# building dependency layer early will speed up compile time when pom is unchanged
RUN mvn verify --fail-never

COPY src ./src

# Build a release artifact.
RUN mvn package

# Use AdoptOpenJDK for base image.
# It's important to use OpenJDK 8u191 or above that has container support enabled.
FROM adoptopenjdk/openjdk11-openj9:alpine-slim

RUN addgroup -S spring && adduser -S spring -G spring
USER spring:spring

# Copy the jar to the production image from the builder stage.
COPY --from=builder /app/target/my-app*.jar /my-app.jar

# Faster if less then 4 CPUs: -Dspring.backgroundpreinitializer.ignore=true
CMD ["java", "-noverify", "-Djava.security.egd=file:/dev/./urandom", "-jar", "my-app.jar", "--spring.jmx.enabled=false"]