[Solved] Dockerfile build - lstat docker-entry.sh: no such file or directory

I am building the Dockerfile via docker build . and everything is going swimmingly until Step 18 where I get the following:

Step 18 : ADD docker-entry.sh /
lstat docker-entry.sh: no such file or directory

I think I know how the ADD instruction is supposed to work, but I don't have docker-entry.sh anywhere nor do I know where I"m supposed to download it from.

I had a similar problem with config_docker.json, but I found it on the Mattermost GitHub site.