Place items in center and lower right corner of a fullscreen flexbox?

On my site, I've created a flex box which fills the whole window. It has a width if 100% and a height of 100vh. I've placed a text and a button in the center of it. Now I want to add a footer to the page. I place the footer under the div (flexbox) It'll only show up if I scroll down a little bit. So can I create another div inside the flexbox which will place it's items in the lower right corner of the page?