This is Docker image to run the newest version of Skype, so it is isolated from the rest of your system. It requires you to have PulseAudio installed and running on your host system. Further you need to activate network access without password in PulseAudio.
You may need to initially build the image by running:
docker build -t pulse-skype:latest .
To run Skype simply execute ./run-skype.sh. This script will create a new pair of SSH keys, if necessary, starts the container and connects to the SSHd server in it.
In this command line you now can run skypeforlinux to start skype.