[+] add Downloads and Docker Pulls badges

Author: pashagolub

README.md

@@ -1,7 +1,9 @@
 [![Documentation](https://img.shields.io/badge/Documentation-pgwat.ch-brightgreen)](https://pgwat.ch)
 [![License: MIT](https://img.shields.io/badge/License-BSD_3-green.svg)](https://opensource.org/license/bsd-3-clause)
 [![Go Build & Test](https://github.com/cybertec-postgresql/pgwatch/actions/workflows/build.yml/badge.svg)](https://github.com/cybertec-postgresql/pgwatch/actions/workflows/build.yml)
-[![Coverage Status](https://coveralls.io/repos/github/cybertec-postgresql/pgwatch/badge.svg?branch=master&service=github)](https://coveralls.io/github/cybertec-postgresql/pgwatch?branch=master)
+[![Coverage Status](https://img.shields.io/coverallsCoverage/github/cybertec-postgresql/pgwatch?branch=master&label=Coverage&color=red)](https://coveralls.io/github/cybertec-postgresql/pgwatch?branch=master)
+[![Downloads](https://img.shields.io/github/downloads/cybertec-postgresql/pgwatch/total?label=Downloads)](https://github.com/cybertec-postgresql/pgwatch/releases)
+[![Docker Pulls](https://img.shields.io/docker/pulls/cybertecpostgresql/pgwatch?label=Docker%20Pulls)](https://hub.docker.com/r/cybertecpostgresql/pgwatch)
 
 # pgwatch: PostgreSQL monitoring solution