chore(docs): update readme

Author: 0x77dev

README.md

@@ -30,6 +30,11 @@ Checkout [Peerchat](https://dstack.dev/blog/peerchat) demo
 
 See [Tutorial](https://dstack.dev/docs/intro) to get started using DStack in your dapp
 
+## Deprecaton Notice
+Version 0.2.x will be deprecated soon, majority of the development is moved to `next` branch.
+
+This version will not receive any major upgrades or improvements, only minor security fixes and dependency upgrades.
+
 ## Introduction
 
 DStack was created to bring together some of the popular libraries/technologies for the decentralized web (like [IPFS](https://ipfs.io)) into a single ecosystem to provide an easy way for developing decentralized web applications where your infrastructure is a single source of truth.