* Minor changes to architecture.md
* Minor changes to base_images.md
* Update link in dotnetcore.md
* Update link in doc/README.md
* Update link in Dockerfile.md
* replace docker hub links qwith mcr links in our docs
* remove doc changes as a trigger for validation builds
* undo trigger changes for validation build
* test without git checkout
* add back checkout step
Cormac McCarthy
Arjun Roy Chaudhuri
Gabriel Castro