fixing(client)

temp/ping-service/Dockerfile

@@ -1,17 +1,41 @@
-FROM openjdk:17-jre-slim
+# syntax=docker/dockerfile:1
+
+# Build stage: compile the ping-service JAR inside Docker
+FROM gradle:8.7-jdk17-alpine AS builder
+WORKDIR /workspace
+
+# Copy the entire repository (simplest and most robust for multi-module setups)
+# This allows building the ping-service even if it depends on shared build files or platforms.
+COPY . .
+
+# Build only the ping-service artifact
+RUN gradle :temp:ping-service:bootJar --no-daemon
+
+# Runtime stage: slim JRE image to run the service
+FROM eclipse-temurin:17-jre-alpine
 
 # Set working directory
 WORKDIR /app
 
-# Copy the ping-service JAR file
-COPY temp/ping-service/build/libs/*.jar app.jar
+# Install curl for health checks (small footprint on Alpine)
+RUN apk add --no-cache curl
 
-# Expose port (will be assigned dynamically by Spring Boot)
-EXPOSE 8080
+# Create a non-root user for better security
+RUN addgroup -S app && adduser -S app -G app
+USER app
 
-# Add health check
-HEALTHCHECK --interval=30s --timeout=3s --start-period=20s --retries=3 \
-  CMD curl -f http://localhost:8080/ping || exit 1
+# Copy the built JAR from the builder stage
+COPY --from=builder /workspace/temp/ping-service/build/libs/*.jar app.jar
+
+# Expose application port
+EXPOSE 8082
+
+# Health check against the ping endpoint
+HEALTHCHECK --interval=30s --timeout=5s --start-period=20s --retries=3 \
+  CMD curl -fsS http://localhost:8082/ping || exit 1
+
+# JVM options can be overridden at runtime via JAVA_OPTS env
+ENV JAVA_OPTS="-XX:MaxRAMPercentage=75.0 -XX:+UseStringDeduplication"
 
 # Run the application
-ENTRYPOINT ["java", "-jar", "app.jar"]
+ENTRYPOINT ["sh", "-c", "exec java $JAVA_OPTS -jar app.jar"]