Dockerfile

FROM eclipse-temurin:17-jre-jammy

# Install wget for healthcheck
RUN apt-get update && apt-get install -y wget && rm -rf /var/lib/apt/lists/*

# Add a non-root user to run the application
RUN groupadd -r spring && useradd -r -g spring spring

# Set working directory
WORKDIR /opt/app

# Copy the JAR file
COPY build/libs/*SNAPSHOT.jar app.jar

# Set ownership of the files
RUN chown -R spring:spring /opt/app

# Use the spring user
USER spring

# Expose the port the app runs on
EXPOSE 8080

# Configure health check - using wget instead of curl
HEALTHCHECK --interval=30s --timeout=3s \
    CMD wget -q --spider http://localhost:8080/actuator/health || exit 1

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