Dockerfile for building an image from CentOS x86_64 with Asterisk 13. You will want to mount a volume with your configuration files to /usr/local/etc/asterisk/.
While you can use the resultant image from the Dockerfile, you will get a substantially smaller image (by 117MB) by using the Makefile.
It uses the first image as a builder image, copies out the artifacts, and builds another image without the dev tools installed.