You could publish a little webpage called "An historical note about the Docker prototype" under your own name, which you could then cite on Wikipedia.
I think it makes perfect sense as a general and strict policy for an encyclopedia. It would simply be too hard to audit every case to check if it's someone like you, or a crank.
The idea is that it's a separate, distinct source, which exists outside of and independently from the encyclopedia itself, and can be archived, mirrored, etc. Its veracity and usefulness can then be debated or discussed as needed.
