It would be very beneficial (I think) if the Documentation webpage had a search icon. I believe that I saw in one of the great Foundry videos an example of how the Container stack was used, but cannot find it again.
Foundry is an amazing RW framework, but knowing where each stack is applicable on a webpage is vital knowledge to have. Perhaps, the RW Library would be a good place to link that knowledge to when the stack is selected.
I also saw a video in which another ‘container’ stack was used, but came with a lot of warnings in how it was to be used. There is a lot to learn with Foundry.