add docker hub badge

.github/workflows/shellcheck.yml

@@ -1,4 +1,4 @@
-name: shellcheck
+name: Shellcheck
 on: [push, pull_request]
 
 jobs:

README.md

@@ -1,7 +1,8 @@
 # An ACME Shell script: acme.sh 
 [![Build Status](https://travis-ci.org/acmesh-official/acme.sh.svg?branch=master)](https://travis-ci.org/acmesh-official/acme.sh)
-![shellcheck](https://github.com/acmesh-official/acme.sh/workflows/shellcheck/badge.svg)
+![shellcheck](https://github.com/acmesh-official/acme.sh/workflows/Shellcheck/badge.svg)
 ![shellcheck](https://github.com/acmesh-official/acme.sh/workflows/PebbleStrict/badge.svg)
+![shellcheck](https://github.com/acmesh-official/acme.sh/workflows/Build%20DockerHub/badge.svg)
 
 
 <a href="https://opencollective.com/acmesh" alt="Financial Contributors on Open Collective"><img src="https://opencollective.com/acmesh/all/badge.svg?label=financial+contributors" /></a>