Backend Changes and Readme update

Readme.md

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+# Monaco Code Execution Engine
+Monaco is a secure, containerized code execution engine that allows you to run code in multiple programming languages through a simple REST API.
+
+## Features
+- Multi-language support: Run code in Python, Java, C, and C++
+- Secure execution: All code runs in isolated Docker containers
+- Resource limits: Memory, CPU, and file descriptor limits to prevent abuse
+- Concurrent processing: Efficient job queue for handling multiple requests
+- Simple REST API: Easy to integrate with any frontend
+
+## Architecture
+Monaco consists of several components:
+
+- HTTP Handlers (handler/handler.go): Processes API requests
+- Execution Service (service/execution.go): Manages code execution in containers
+- Job Queue (queue/queue.go): Handles concurrent execution of code submissions
+- Submission Model (model/submission.go): Defines the data structure for code submissions
+
+## Requirements
+- Go 1.22.3 or higher
+- Docker
+- Network connectivity for container image pulling