Update Dockerfile for Sudoku Game

Dockerfile

@@ -0,0 +1,16 @@
+FROM openjdk:17-jdk-slim
+
+WORKDIR /app
+
+# Copy the jar file
+COPY target/*.jar app.jar
+
+# Expose port 7860 (required by Hugging Face)
+EXPOSE 7860
+
+# Set environment variables for Hugging Face Space
+ENV SERVER_PORT=7860
+ENV SPRING_PROFILES_ACTIVE=prod
+
+# Run the application
+ENTRYPOINT ["java", "-Dserver.port=7860", "-jar", "/app/app.jar"]