shameless plug: I'm already using headless Chrome for https://www.prerender.cloud/ and it's amazing (just building it from source https://docs.google.com/document/d/1a9cdsljKxCSreR2LDE3KErJh...)
(Disclosure: I'm a developer advocate for chrome so I'm heavily biased, but I love everything people are doing g with browsers on the server https://paul.kinlan.me/the-headless-web/ )
I wrote something similar to serve low-bandwidth (pre-readabilitied pages) to my parents low-bandwidth internet over a MITM proxy.