# Built on the build machine's own platform; the image only holds the jar and a JRE.
FROM --platform=$BUILDPLATFORM maven:3.9-eclipse-temurin-21 AS build
WORKDIR /src
COPY pom.xml .
RUN mvn -B -q dependency:go-offline
COPY src src
# Tests run in scripts/check.sh; some read contract files from gateway/, outside this context.
RUN mvn -B -q package -Dmaven.test.skip=true

FROM eclipse-temurin:21-jre-alpine
# The release tag, shown in /api/health; the release workflow passes it.
ARG VERSION=dev
ENV VERSION=$VERSION
USER 10001:10001
WORKDIR /app
COPY --from=build /src/target/home-pump-backend-1.0.0.jar app.jar
EXPOSE 8080
# /api/health answers 200 even while the gateway is unreachable (it reports that in the body),
# so this only tells whether the backend itself serves requests. busybox wget ships with alpine.
HEALTHCHECK --interval=30s --timeout=3s --start-period=10s \
    CMD wget -q -O /dev/null "http://127.0.0.1:${PORT:-8080}/api/health" || exit 1
ENTRYPOINT ["java", "-jar", "app.jar"]
