Merge branch 'testing2' into 'master'

upgraded to jupiter based

See merge request surya/devops-workshop!8

setupJenkins

@@ -8,7 +8,7 @@ sudo sh -c 'echo deb http://pkg.jenkins.io/debian-stable binary/ > /etc/apt/sour
 sudo apt update
 sudo apt install jenkins
 sudo gpasswd -a jenkins docker
-sudo usermod -aG docker jenkins
+sudo usermod -a -G docker jenkins
 sudo systemctl daemon-reload
 sudo systemctl restart docker
 sudo service jenkins start