Update README.md

README.md

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 [![Workflow](https://github.com/NodeBB/NodeBB/actions/workflows/test.yaml/badge.svg)](https://github.com/NodeBB/NodeBB/actions/workflows/test.yaml)
 [![Coverage Status](https://coveralls.io/repos/github/NodeBB/NodeBB/badge.svg?branch=master)](https://coveralls.io/github/NodeBB/NodeBB?branch=master)
 [![Code Climate](https://codeclimate.com/github/NodeBB/NodeBB/badges/gpa.svg)](https://codeclimate.com/github/NodeBB/NodeBB)
+[![](https://dcbadge.vercel.app/api/server/p6YKPXu7er?style=flat)](https://discord.gg/p6YKPXu7er)
 
 [**NodeBB Forum Software**](https://nodebb.org) is powered by Node.js and supports either Redis, MongoDB, or a PostgreSQL database. It utilizes web sockets for instant interactions and real-time notifications. NodeBB takes the best of the modern web: real-time streaming discussions, mobile responsiveness, and rich RESTful read/write APIs, while staying true to the original bulletin board/forum format → categorical hierarchies, local user accounts, and asynchronous messaging.