Refactor .container into individual pages

[prestonp]

https://github.com/open-austin/budgetparty/blob/master/app/src/components/index.js#L82

This needs to get moved into each of the individual pages so that certain pages can fill out the background

https://github.com/open-austin/budgetparty-landing/issues/7 for more info

[mateoclarke]

This one is tedious and my fault. I can take it off your plate if you want @prestonp