Dockerfile

FROM eclipse-temurin:21.0.6_7-jre-alpine as builder
WORKDIR /app
ARG JAR_FILE=target/boot-r2dbc-json-column-0.0.1-SNAPSHOT.jar
COPY ${JAR_FILE} application.jar
RUN java -Djarmode=layertools -jar application.jar extract

# the second stage of our build will copy the extracted layers
FROM eclipse-temurin:21.0.6_7-jre-alpine
WORKDIR /app
RUN addgroup -S spring && adduser -S spring -G spring
USER spring:spring
COPY --from=builder application/dependencies/ ./
COPY --from=builder application/spring-boot-loader/ ./
COPY --from=builder application/snapshot-dependencies/ ./
COPY --from=builder application/application/ ./
EXPOSE 8080
HEALTHCHECK --interval=30s --timeout=3s \
  CMD wget -q --spider http://localhost:8080/actuator/health || exit 1
ENTRYPOINT ["java", \
  "-XX:MaxRAMPercentage=75.0", \
  "-XX:InitialRAMPercentage=50.0", \
  "-Djava.security.egd=file:/dev/./urandom", \
  "org.springframework.boot.loader.launch.JarLauncher"]