verify run.sh / docker installation script

• Please verify whether the run.sh works with the release 1.6.0
• @robert.hedler please provide feedback on the documentation at https://infra.peerplays.com/witnesses/installation-guides/docker-install to @Bharathi-Chandrasekaran

@Bharathi-Chandrasekaran : Based on the input from @robert.hedler , please update the documentation if necessary.