Tomn usds/template8 (#118)

* Fix issues from #120
* Include USWDS scss into build.
  Allows us to do theme things. Compile time slower... Not sure if it's worth it since most items can be overridden in css and we can't theme the Navbar (e.g. invert colors).
* Update J40Footer.spec.tsx.snap
* Update gatsby-config.js

client/src/components/J40Footer.tsx

@@ -8,6 +8,7 @@ const J40Footer = () => {
     <>
       <Footer
         size="big"
+        className={'j40-footer'}
         primary={<></>}
         secondary={<FooterNav
           aria-label="Footer navigation"
@@ -66,13 +67,12 @@ const J40Footer = () => {
                       alt={'Whitehouse logo'}/>
                   }
                   heading={<p
-                    className={' j40-footer-logo-heading'}>
+                    className={'j40-footer-logo-heading'}>
                     Council on Environmental Quality</p>}
                 />
               </>,
               <>
                 <Address
-                  className={'j40-address-readability'}
                   key={'footeraddress'}
                   items={[
                     '730 Jackson Pl NW',