A usual question in CSS / HTML forums is How do you put a sticky footer at the bottom of the window? or How do I place some text at the bottom of a column/element?. There are several ways to do this, but IMHO you should check this links before trying anything else.
How do you put a sticky footer at the bottom of the window?
How do I place some text at the bottom of a column/element?
Hope it helps someone!