Limit footer to bottom

[LageTs]

Hello everyone!

I also discovered what is already topic in #502 and wanted to fix this problem:

When the content of a page is so small that the full page is smaller than the view-port the footer is not at the bottom.

With those little changes the page will be at least the size of the view-port and the space between content and footer is automatically a fitting margin at the top of the footer.

Same idea was also mentioned by https://github.com/Altonss

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[ramiro]

Perhaps worth mentioning is that for this issue to manifest (or at least to increase the chance of this) there should be no featured_image defined that pushes the post body to the bottom.

e.g. commenting this out in the example site:

gohugo-theme-ananke/exampleSite/content/en/_index.md

Line 8 in f34c219

featured_image: '/images/gohugo-default-sample-hero-image.jpg'