Create banner for website to advertise events

[lwasser]

Following discussion in #335

ok - let's give this a last review!! @kierisi here is the rendered page with all of the changes we've been talking about here.

i'm thinking once we have some events on the calendar we can add a events section to the page? And then also parse those on the home page as well? but we can implement that in a separate pr to get this one merged. let's focus this one on just getting the content consistent and looking nice as a new section on the website.

i'm also kind of liking the canva graphics. they are easy to make and there is no issues in terms of licensing !!

an events section would be great! it might be nice to put them up as a banner that links to registration.

Originally posted by @kierisi in #335 (comment)