add better logo css

README.md

@@ -3,7 +3,10 @@
 [![Docker Pulls](https://img.shields.io/docker/pulls/i5heu/simple-S3-cache)](https://hub.docker.com/repository/docker/i5heu/simple-S3-cache)
 [![wakatime](https://wakatime.com/badge/github/i5heu/bonito-cache.svg)](https://wakatime.com/badge/github/i5heu/bonito-cache)
 
-![Logo of a humanoid fish holding notes and a note box](./media/logo_small.png)
+<p align="center" style="margin: 2em;">
+  <img style="border-radius: 25%;" height="400" alt="Logo of a humanoid fish holding notes and a note box" src="./media/logo_small.png">
+</p>
+
 
 # bonito-cache
 Just hook it in front of your public S3 bucket and enjoy reduction in bandwidth costs to your bucket