Docker image that is a simple modification of the kali linux official docker image (kalilinux/kali-linux-docker) with the metasploit-framework package already installed.
Ports 4444 and 8080 are exposed for easy exploit/handler binding.
A start.sh script is provided for executing the docker run command with these ports already mapped. In addition to that, the directory ~/.msf4 of the host is mapped to the corresponding directory in the container to allow data exchange easily (e.g. loading external/custom modules, retrieving post-exploitation screenshots, etc.).
More info about loading external modules can be read in the metasploit-framework wiki.