Custom runtime for spring boot app

Dockerfile

FROM eclipse-temurin:17 as jre-build

RUN $JAVA_HOME/bin/jlink \
         --add-modules java.base,java.sql,java.naming,java.desktop,java.management,java.security.jgss,java.instrument  \
         --strip-debug \
         --no-man-pages \
         --no-header-files \
         --compress=2 \
         --output /javaruntime

FROM debian:buster-slim

ENV JAVA_HOME=/opt/java/openjdk
ENV PATH "${JAVA_HOME}/bin:${PATH}"
COPY --from=jre-build /javaruntime $JAVA_HOME

WORKDIR /apps
EXPOSE 8080

RUN addgroup spring
RUN adduser --system spring --ingroup spring --no-create-home --disabled-password --disabled-login
USER spring:spring

ADD target/your-jar-0.1.0.jar /apps/app.jar

ENTRYPOINT ["java","-jar","/apps/app.jar"]