add headless chromium software release
This also adds a headless-chromium component and enables the http_sub module in the Nginx component. Some basic tests are included. See merge request nexedi/slapos!1014 for more details and discussion.
This also adds a headless-chromium component and enables the http_sub module in the Nginx component. Some basic tests are included. See merge request nexedi/slapos!1014 for more details and discussion.