Update readme

Author: nazarhussain

README.md

@@ -1 +1,5 @@
-[![Eth Consensus Spec v1.5.0](https://img.shields.io/badge/ETH%20consensus--spec-1.5.0-blue)](https://github.com/ethereum/consensus-specs/releases/tag/v1.5.0)
+# simpleserialize.com
+
+A simple website to list down the features and usage of [SSZ](https://github.com/ethereum/consensus-specs/blob/dev/ssz/simple-serialize.md).
+
+This was earlier maintained inside [ssz monorepo](https://github.com/ChainSafe/ssz) and extracted now to better visibility for the community.