CI test

docker/Dockerfile

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+# ===== Build Stage =====
+FROM maven:3.9.6-eclipse-temurin-21 AS builder
+
+WORKDIR /build
+
+# Copy pom.xml first for better layer caching
+COPY pom.xml .
+RUN mvn dependency:go-offline -B
+
+# Copy source code
+COPY src ./src
+
+# Build the application
+RUN mvn clean package -DskipTests -B
+
+# ===== Runtime Stage =====
+FROM eclipse-temurin:21-jre-jammy
+
+WORKDIR /app
+
+# Create non-root user
+RUN groupadd --system spring && \
+    useradd --system --gid spring --create-home spring
+
+# Copy the JAR from build stage
+COPY --from=builder --chown=spring:spring /build/target/*.jar app.jar
+
+# Switch to non-root user
+USER spring
+
+# Expose Spring Boot default port
+EXPOSE 8080
+
+# Health check
+HEALTHCHECK --interval=30s --timeout=3s --start-period=60s --retries=3 \
+  CMD curl -f http://localhost:8080/actuator/health || exit 1
+
+# Run the application
+ENTRYPOINT ["java", "-XX:+UseContainerSupport", "-XX:MaxRAMPercentage=75.0", "-jar", "app.jar"]