add logo

README.md

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-# rtsp-simple-server
+<h1 align="center">
+    <img src="logo.png" alt="rtsp-simple-server">
+</h1>
 
 [![Test](https://github.com/aler9/rtsp-simple-server/workflows/test/badge.svg)](https://github.com/aler9/rtsp-simple-server/actions?query=workflow:test)
 [![Lint](https://github.com/aler9/rtsp-simple-server/workflows/lint/badge.svg)](https://github.com/aler9/rtsp-simple-server/actions?query=workflow:lint)
 [![CodeCov](https://codecov.io/gh/aler9/rtsp-simple-server/branch/main/graph/badge.svg)](https://codecov.io/gh/aler9/rtsp-simple-server/branch/main)
-[![Docker Hub](https://img.shields.io/badge/docker-aler9%2Frtsp--simple--server-blue)](https://hub.docker.com/r/aler9/rtsp-simple-server)
+[![Release](https://img.shields.io/github/v/release/aler9/rtsp-simple-server)](https://github.com/aler9/rtsp-simple-server/releases)
+[![Docker Hub](https://img.shields.io/badge/docker-aler9/rtsp--simple--server-blue)](https://hub.docker.com/r/aler9/rtsp-simple-server)
 
 _rtsp-simple-server_ is a simple, ready-to-use and zero-dependency RTSP/RTMP server and proxy, a software that allows users to publish, read and proxy live video and audio streams. RTSP is a specification that describes how to perform these operations with the help of a server, that is contacted by both publishers and readers and relays the publisher's streams to the readers.