Dockerfile

# Use Maven + JDK 17 image for building
FROM maven:3.9.3-eclipse-temurin-17 AS build

WORKDIR /app

# Copy pom and java files
COPY pom.xml .
COPY src ./src

# Build the jar
RUN mvn clean package -DskipTests

# Use smaller JDK image for runtime
FROM eclipse-temurin:17-jdk-jammy

WORKDIR /app

# Copy jar from build stage
COPY --from=build /app/target/demo-0.0.1-SNAPSHOT.jar app.jar

# Expose default Spring Boot port
EXPOSE 8080

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