# ============================
# 1. Build Stage (Maven + JDK)
# ============================
FROM maven:3.9.6-eclipse-temurin-21 AS build

WORKDIR /app

# Copiar pom.xml y descargar dependencias (cache)
COPY pom.xml .
RUN mvn -q -e -B dependency:go-offline

# Copiar el código fuente
COPY src ./src

# Compilar el proyecto
RUN mvn -q -e -B clean package -DskipTests

# ============================
# 2. Runtime Stage (JDK ligero)
# ============================
FROM eclipse-temurin:21-jre-alpine

WORKDIR /app

# Copiar el JAR generado
COPY --from=build /app/target/*.jar app.jar

# Puerto interno del contenedor
EXPOSE 8080

# Ejecutar Spring Boot
ENTRYPOINT ["java", "-jar", "/app/app.jar"]