I Could find any microsoft documentation explaining the difference between Docker@0, Docker@1 etc. There are some difference between these I could see, for example the azureSubscription property is only available in Docker@0, while tags usually found only in Docker@2.
So far the only link available is link
There is no such doc explaining the difference between the 3 versions, Docker@2 is currently default version for yaml, it's recommended to use this version for your pipeline.
But if you'd like to, you can check below items for the difference:
You can use classic editor to check the task notes:
In addition, you can find the 3 tasks on github link.
You can check commit history to check the change roadmap.
You probably will not find details about differences between them, however the last one is recomended to use. But if you want to check source code - it is available here:
There is no even readme for specific version of the task.
