Adds Chainstack

Author: TABASCOatw

src/content/developers/docs/frameworks/index.md

@@ -99,6 +99,12 @@ Before diving into frameworks, we recommend you first read through our introduct
 - [GitHub](https://github.com/node-real)
 - [Discord](https://discord.gg/V5k5gsuE)
 
+**Chainstack -** **_Web3 (Ethereum and otherwise) Development Platform._**
+
+- [chainstack.com](https://www.chainstack.com/)
+- [GitHub](https://github.com/chainstack)
+- [Discord](https://discord.gg/BSb5zfp9AT)
+
 ## Further reading {#further-reading}
 
 _Know of a community resource that helped you? Edit this page and add it!_