# Stage that builds the application, a prerequisite for the running stage
FROM eclipse-temurin:21-jdk-noble AS build

RUN apt-get update -qq

# Stop running as root at this point
RUN useradd -m app
WORKDIR /usr/src/app/
RUN chown app:app /usr/src/app/
USER app

# Copy pom.xml and prefetch dependencies so a repeated build can continue from the next step with existing dependencies
COPY --chown=app ./gradle/ ./gradle
COPY --chown=app ./gradlew ./build.gradle ./settings.gradle ./

# Copy all needed project files to a folder
COPY --chown=app:app ./src ./src

# Build the production package
RUN ./gradlew clean build -x test

# Running stage: the part that is used for running the application
FROM eclipse-temurin:21-jre-noble

RUN useradd -m app
USER app

COPY --chown=app --from=build /usr/src/app/build/libs/*-SNAPSHOT.jar /usr/app/eureka.jar

EXPOSE 8761
CMD ["java", "-jar", "/usr/app/eureka.jar"]