Dockerfile.native-build

# Multi-stage build for native compilation
# Spring Boot 4.0.0 requires GraalVM with Java 25+
FROM ghcr.io/graalvm/native-image-community:25 AS builder

# Install Maven
RUN microdnf install -y maven

# Set working directory
WORKDIR /app

# Copy Maven files
COPY pom.xml .
COPY src ./src

# Build the native executable
RUN mvn clean -Pnative compile spring-boot:process-aot native:compile -DskipTests

# Runtime stage
FROM ubuntu:24.04

# Install minimal runtime dependencies
RUN apt-get update && \
    apt-get install -y --no-install-recommends \
    ca-certificates \
    curl \
    && rm -rf /var/lib/apt/lists/*

# Create a non-root user
RUN groupadd -r janus && useradd -r -g janus janus

# Create application directory
WORKDIR /app

# Copy the native executable from builder stage
COPY --from=builder /app/target/janus /app/janus

# Make it executable and set ownership
RUN chmod +x /app/janus && \
    chown janus:janus /app/janus

# Switch to non-root user
USER janus

# Expose the default Spring Boot port
EXPOSE 8080

# Health check
HEALTHCHECK --interval=30s --timeout=3s --start-period=40s --retries=3 \
    CMD curl -f http://localhost:8080/actuator/health || exit 1

# Run the native executable
ENTRYPOINT ["./janus"]