Dockerfile

FROM gradle:8.14.0-jdk21 AS build

WORKDIR /app

# Copy Gradle wrapper and build files
COPY gradle/ gradle/
COPY gradlew .
COPY settings.gradle.kts .
COPY build.gradle.kts .

# Copy source code
COPY src/ src/

# Make gradlew executable
RUN chmod +x gradlew

# Build the application
RUN ./gradlew clean build --exclude-task test --no-daemon --build-cache --parallel

# Runtime stage
FROM openjdk:21-slim

WORKDIR /app

# Install curl for health checks
RUN apt-get update && apt-get install -y curl && rm -rf /var/lib/apt/lists/*

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

# Copy JAR file
COPY --from=build /app/build/libs/*.jar app.jar

# Set ownership
RUN chown spring:spring app.jar

USER spring

EXPOSE 8080

# Health check
HEALTHCHECK --interval=30s --timeout=3s --start-period=60s --retries=3 \
  CMD curl -f http://localhost:8080/actuator/health || exit 1

# Production JVM options
ENV JAVA_OPTS="-XX:+UseContainerSupport -XX:MaxRAMPercentage=75.0 -XX:+UseG1GC -XX:+DisableExplicitGC -XX:+HeapDumpOnOutOfMemoryError"

# Run with production profile
ENTRYPOINT ["sh", "-c", "java $JAVA_OPTS -Dspring.profiles.active=${SPRING_PROFILES_ACTIVE} -jar app.jar"]