Add Latest release and Docker shields to README (jenkinsci#4119)

* Add Latest release and Docker shields to README

* Use Jenkins update center as an information source

* Use Jenkins endpoits and HTTPs

* Change the badge color to retrigger CI

README.md

@@ -1,6 +1,11 @@
 [![][ButlerImage]][website] 
 
 # About
+
+[![Weekly Release](https://img.shields.io/badge/dynamic/json.svg?url=https://updates.jenkins.io/update-center.actual.json&label=Weekly%20Release&query=$.core.version&color=green)](https://jenkins.io/changelog/)
+[![LTS Release](https://img.shields.io/badge/dynamic/json.svg?url=https://updates.jenkins.io/stable/update-center.actual.json&label=LTS%20Release&query=$.core.version&color=orange)](https://jenkins.io/changelog-stable/)
+[![Docker Pulls](https://img.shields.io/docker/pulls/jenkins/jenkins.svg)](https://hub.docker.com/r/jenkins/jenkins/)
+
 In a nutshell, Jenkins is the leading open-source automation server. 
 Built with Java, it provides over 1000 plugins to support automating virtually anything, 
 so that humans can actually spend their time doing things machines cannot.