[now-next] Cache All Next.js Directories  (#3190)
[now-next] Cache All Next.js Directories  (#3190)

Next.js now uses the `css` and `media` folders for its build-in CSS support. These files should be cached forever.
zeit/now-cli,zeit/now-cli,zeit/now-cli,zeit/now-cli,zeit/now-cli,zeit/now-cli,zeit/now-cli