Compile assets on staging.
Compile assets on staging.

- Commit 965fb2902b7c160c9f5e2c7ec1797c29ec89df97 introduced a production like staging environment which, among other things, assumed that we were precompiling our assets.  We're not precompiling them which resulted in us seeing the following error:

    ActionView::Template::Error (application.css isn't precompiled):

- It's probably better to have them precompiled on deployment but this fix will get the staging site running again in the short term.

YOTOV-LIMITED/whitehall,robinwhittleton/whitehall,askl56/whitehall,askl56/whitehall,alphagov/whitehall,ggoral/whitehall,robinwhittleton/whitehall,hotvulcan/whitehall,YOTOV-LIMITED/whitehall,hotvulcan/whitehall,YOTOV-LIMITED/whitehall,alphagov/whitehall,YOTOV-LIMITED/whitehall,ggoral/whitehall,ggoral/whitehall,robinwhittleton/whitehall,alphagov/whitehall,ggoral/whitehall,askl56/whitehall,hotvulcan/whitehall,askl56/whitehall,alphagov/whitehall,robinwhittleton/whitehall,hotvulcan/whitehall