Dockerfile

# Use OpenJDK 17 as base image
FROM openjdk:17-jdk-slim

# Set working directory
WORKDIR /app

# Copy Maven wrapper and pom.xml
COPY mvnw .
COPY .mvn .mvn
COPY pom.xml .

# Make Maven wrapper executable
RUN chmod +x mvnw

# Download dependencies (this layer will be cached if pom.xml doesn't change)
RUN ./mvnw dependency:go-offline -B

# Copy source code
COPY src src

# Build the application
RUN ./mvnw clean package -DskipTests

# Create a new stage for runtime
FROM openjdk:17-jre-slim

# Set working directory
WORKDIR /app

# Copy the built JAR from the build stage
COPY --from=0 /app/target/*.jar app.jar

# Expose port
EXPOSE 8080

# Set JVM options for production
ENV JAVA_OPTS="-Xmx512m -Xms256m"

# Run the application
ENTRYPOINT ["sh", "-c", "java $JAVA_OPTS -jar app.jar"]