jcderr/nginx-onbuild
This uses the official nginx image, plus an onbuild statement, to help set up more complex environments. Anything in your context gets added to /etc/nginx via COPY.
Add a conf.d/site.conf file and it will be included. I set ENTRYPOINT [ "nginx" ]
so that your CMD should only include arguments to nginx.
FROM jcderr/nginx-onbuild:latest
MAINTAINER Your Name "your@domain"
CMD [ "-g", "daemon off;" ]