You should have docker installed, and for wide port ranges, you will need
# --userland-proxy=false
Added to the ExecStart of dockerd in the docker service file.
The username and password used for logging into the resulting container is set in start.sh
Copy the sources to your docker host and build the container:
# docker build --rm -t veeam/ssh:centos7 .
To run:
# docker run -v /mnt/raid10:/mnt -d -p 2222:22 -p 2500-5000:2500-5000 veeam/ssh:centos7
To test:
# ssh -p 2222 user@localhost