This documents how I integrate Vue 2.0 with Phoenix 1.x using the default brunch pipeline.
Start out by adding the vue-brunch plugin. You will need a version later than 1.2.3 in order to be able to use the extractCSS option (see later). At the time of writing, 1.2.3 was still the version fetched by npm so I suggest just getting the tip of the dev branch for now (this branch is for Vue 2.0 compatibility anyway):
npm install git+https://github.com/nblackburn/vue-brunch.git#dev --save-dev
TLDR: I now add the following snippet to all my Dockerfiles:
# If host is running squid-deb-proxy on port 8000, populate /etc/apt/apt.conf.d/30proxy
# By default, squid-deb-proxy 403s unknown sources, so apt shouldn't proxy ppa.launchpad.net
RUN route -n | awk '/^0.0.0.0/ {print $2}' > /tmp/host_ip.txt
RUN echo "HEAD /" | nc `cat /tmp/host_ip.txt` 8000 | grep squid-deb-proxy \
&& (echo "Acquire::http::Proxy \"http://$(cat /tmp/host_ip.txt):8000\";" > /etc/apt/apt.conf.d/30proxy) \
&& (echo "Acquire::http::Proxy::ppa.launchpad.net DIRECT;" >> /etc/apt/apt.conf.d/30proxy) \
|| echo "No squid-deb-proxy detected on docker host"