Improve README.md for Better Onboarding and Clarity

[holyaustin]

📝 Description

The current README.md in the graph-node repository is functional but lacks a clear structure, modern documentation flow, and beginner-friendly onboarding guidance. This makes it harder for new contributors and subgraph developers to quickly understand how to run and contribute to Graph Node.

🔧 Proposed Improvements

I propose the following enhancements to the README.md:

• ✅ Add a clear title and project description with badges (build status, docs, Discord)
• ✅ Restructure content with intuitive sections:
  • Overview
  • Getting Started (Docker vs. source)
  • Prerequisites
  • Build and Run
  • Deploy a Subgraph
  • Advanced Configuration
  • Contributing
  • License
• ✅ Add Docker setup instructions — recommended for most developers
• ✅ Improve readability with tables, code blocks, and links
• ✅ Guide first-time contributors with a "Good First Issues" link
• ✅ Modernize tone and flow for better onboarding

Why This Matters

• Thousands of developers use Graph Node — a clearer README reduces friction
• Better documentation = faster onboarding = more contributions
• Aligns with best practices in open-source projects

Next Steps

Once this issue is accepted, I will:

1. Fork the repo
2. Create a branch
3. Update the README.md with the proposed structure
4. Submit a pull request for review

I welcome feedback on the proposed structure before implementation.

Thank you!