you can find it here
if you want pull and use this web server just run following commands:
docker pull metair/openlitespeed:latest
just clone it with git and then go to the direcotry and build it.
this is what you have to do for doing these things:
git clone https://github.com/MetaiR/openlitespeed-php72-dockerfile.git
cd openlitespeed-php72-dockerfile
docker build .