Update README.md

Author: 22388o⚡️

README.md

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 [![Publish to NPM](https://github.com/AreaLayer/javascript-dlc/actions/workflows/npm-publish.yml/badge.svg)](https://github.com/AreaLayer/javascript-dlc/actions/workflows/npm-publish.yml)
 [![Bitcoin-only](https://img.shields.io/badge/bitcoin-only-FF9900?logo=bitcoin)](https://twentyone.world)
 [![LN](https://img.shields.io/badge/lightning-792EE5?logo=lightning)](https://mempool.space/lightning)
+[![Nostr](https://img.shields.io/badge/nostr-only-FF9900?)]((https://user-images.githubusercontent.com/99301796/223592277-34058d0e-af30-411d-8dfe-87c42dacdcf2.png))
+
 
 >A Javascript library for working with [Discreet Log Contracts](https://adiabat.github.io/dlc.pdf).