# Step 1: Build the Spring Boot app
FROM maven:3.9.6-eclipse-temurin-21-alpine AS builder
WORKDIR /app
COPY . .
RUN mvn clean package -DskipTests

# Step 2: Run the app with a minimal Alpine JRE
FROM eclipse-temurin:21-jre-alpine
WORKDIR /app

# Copy the built JAR from builder stage
COPY --from=builder /app/target/*.jar app.jar

# Optional: Add non-root user
RUN adduser -D springuser
USER springuser

# Run the app
ENTRYPOINT ["java", "-jar", "/app/app.jar"]