The blog title can now be set to be an image. If not it will default to
the text. If no text it will just be "Blog".
A Post has now been given a default post image that will be used for all
posts for their openGraph sharing. This can later be expanded to allow
a blog post to have a desired image.
This was done because setting up a test even as an example was hard with
the dependencies and other things. It may be doable, but the time
required was not worth it.
