[Docs] Community Improved Docker Guide for Monad Testnet

[Asplana92]

Hey Monad team 👋

I created an improved Docker guide for running a single-node Monad Testnet setup.
It includes .env examples, docker-compose.yml, health checks, and monitoring notes (Prometheus/Grafana ready).
Verified on a clean Ubuntu 24.04 host — stable RPC and container health confirmed.

👉 Full guide on GitHub:
https://github.com/Asplana92/Web3-Journey/blob/main/Monad/Monad/Docs/Improved_Docker_Guide.md

Hope it helps new builders and contributors to get started faster 🚀
— Tolik | Infra Builder