add readme image

Author: Pothulapati

README.md

@@ -1,5 +1,7 @@
 # terraform-provider-dfcloud
 
+[![Dragonfly Cloud Logo](.github/images/logo-full.svg)](https://dragonflydb.cloud/)
+
 Dragonfly Cloud terraform provider is a terraform provider for managing resources in [Dragonfly Cloud](https://dragonflydb.cloud/).
 
 This provider is currently in *beta*. Feel free to try it out and provide feedback through issues.