# --- etap 1: build ---
FROM maven:3.9-eclipse-temurin-21 AS build
WORKDIR /build

# najpierw same zaleznosci, zeby warstwa z pobranymi artefaktami byla cache'owana
COPY pom.xml .
RUN mvn -B dependency:go-offline

COPY src ./src
RUN mvn -B clean package -DskipTests

# --- etap 2: runtime ---
FROM eclipse-temurin:21-jre-alpine
WORKDIR /app

# aplikacja nie dziala na roocie
RUN addgroup -S app && adduser -S app -G app

COPY --from=build /build/target/*.jar app.jar
RUN chown app:app app.jar

USER app
EXPOSE 8080

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