# ── Stage 1: Build ───────────────────────────────────────────────────────────
FROM gradle:8-jdk21-alpine AS build
WORKDIR /app
COPY build.gradle.kts settings.gradle.kts ./
COPY gradle gradle
COPY gradlew ./
# Download dependencies first (layer cache)
RUN ./gradlew dependencies --no-daemon || true
COPY src src
RUN ./gradlew bootJar --no-daemon

# ── Stage 2: Runtime ─────────────────────────────────────────────────────────
FROM eclipse-temurin:21-jre-alpine AS runtime
WORKDIR /app
COPY --from=build /app/build/libs/*.jar app.jar
EXPOSE 8080
ENTRYPOINT ["java", "-jar", "app.jar"]