Docker container for Varnish 4.1.
Uses phusion/baseimage:0.9.19 as its base image, and the official Varnish repositories for the Varnish version.
varnishncsa logs are forwarded via syslog so they are available to
docker logs.
VARNISH_OPTIONS: Specifies your command line options tovarnishd. At minimum, you'll need to specify a location for the VCL using the-foption or use the-boption to specify a backend.VARNISHNCSA_LOGFORMAT: Specifies your format string forvarnishncsa. This is configurable, but the default is pretty sane.