OK this story, btw, gets weirder.
I have two installs, both ‘development’ setups, this one and another which is a non-docker Ubuntu setup.
I notice that calls to /stylesheets/ on the non-docker dev server do not include “Transfer-Ecoding: chunked” in the header from the Rails server and instead include a “Content-Length” value… can anyone explain how that could be different?
Update: might be explained by https://stackoverflow.com/questions/29112728/when-does-rails-respond-with-transfer-encoding-vs-content-length