rails Cache-Control header not reliably set

[jhspaybar]

location ~ /assets\/application-.* {
      gzip_static on;
      expires max;
      add_header Cache-Control public;
}

doesn't pick up assets like <%= stylesheet_link_tag 'spree/frontend/all', media: 'screen' %>
I think this should just be matching location ~ ^/assets/ as seen here http://guides.rubyonrails.org/asset_pipeline.html#highlighter_226731 .

I'd also be happy to override this myself, should I just copy an nginx into my container over the top of this one in the short term?

[jhspaybar]

For what it's worth, I added this to my Dockerfile and it respects my settings COPY config/nginx.conf /etc/nginx/nginx.conf