Java Spring Ultimate Dockerfile

Dockerfile

##### PRE BUILD ARGUMENTS ######
ARG UID=1001
ARG GID=1001
ARG USER=nonroot
ARG MVN_VERSION=3.8.6
ARG JDK_VERSION=18
##### Base Image with dependencies downloaded ######
FROM --platform=$BUILDPLATFORM maven:${MVN_VERSION}-eclipse-temurin-${JDK_VERSION} as base
WORKDIR /app
ARG BUILDOS
ARG BUILDARCH

COPY pom.xml .
RUN --mount=type=cache,target=/root/.m2,rw mvn dependency:go-offline
##### Builder Image for the source code ######
FROM base as builder

COPY src src

RUN mvn -e -DskipTests package     

RUN java -Djarmode=layertools -jar /app/target/*.jar extract --destination target/extracted

################# RUNTIME ####################
FROM --platform=$BUILDPLATFORM eclipse-temurin:${JDK_VERSION}-jre-jammy as final
ARG UID
ARG GID
ARG USER
WORKDIR /app
################# SECURITY ####################
RUN groupadd ${USER} -r -g ${GID} && useradd ${USER} -g ${GID} -u ${UID} --no-create-home
ARG EXTRACTED=/app/target/extracted
COPY --from=builder --chown=${UID}:${GID} ${EXTRACTED}/dependencies/ ./
COPY --from=builder --chown=${UID}:${GID} ${EXTRACTED}/spring-boot-loader/ ./
COPY --from=builder --chown=${UID}:${GID} ${EXTRACTED}/snapshot-dependencies/ ./
COPY --from=builder --chown=${UID}:${GID} ${EXTRACTED}/application/ ./

################# LABELS ####################
ARG BUILD_DATE
ARG COMMIT_USER
LABEL org.opencontainers.image.created=$BUILD_DATE
LABEL org.opencontainers.image.authors=$COMMIT_USER

################# ENTRYPOINT ####################
USER ${USER}
ENTRYPOINT ["java", "-Xms512m", "-Xmx512m", "org.springframework.boot.loader.JarLauncher"]