Dockerfile

####
# This Dockerfile is used in order to build a container that runs the Spring Boot application
#
# Build the image with:
#
# docker build -f docker/Dockerfile -t springboot/sample-demo .
#
# Then run the container using:
#
# docker run -i --rm -p 8081:8081 springboot/sample-demo
####
FROM registry.access.redhat.com/ubi8/openjdk-21 AS builder

# Build dependency offline to streamline build
RUN mkdir project
WORKDIR /home/jboss/project
COPY pom.xml .
RUN mvn dependency:go-offline

COPY src src
RUN mvn package -Dmaven.test.skip=true
# compute the created jar name and put it in a known location to copy to the next layer.
# If the user changes pom.xml to have a different version, or artifactId, this will find the jar
RUN grep version target/maven-archiver/pom.properties | cut -d '=' -f2 >.env-version
RUN grep artifactId target/maven-archiver/pom.properties | cut -d '=' -f2 >.env-id
RUN mv target/$(cat .env-id)-$(cat .env-version).jar target/export-run-artifact.jar

FROM registry.access.redhat.com/ubi8/openjdk-21-runtime
COPY --from=builder /home/jboss/project/target/export-run-artifact.jar  /deployments/export-run-artifact.jar
EXPOSE 8081
ENTRYPOINT ["/opt/jboss/container/java/run/run-java.sh", "--server.port=8081"]