Docker problem solved!

Finally got the dockerfile from the Linux Academy to successfully run on my Linux Mint computer by…Uninstalling the old then reinstalling docker. Followed this guide which managed to accomplish the task in far fewer words than others I saw. Now at Docker version 19.03.5, build 633a0ea838! Wow that little diversion really slowed my Docker progress. However as usual solving problems causes you to dig deeper onto a subject!

Although upgrading fixed the problem I somehow feel there must have been some other underlying reason for the failure.