Merge pull request #699 from stevecrozz/suppress-debconf-warnings

fix(Dockerfile): debconf use noninteractive

Dockerfile

@@ -1,7 +1,7 @@
 FROM ubuntu:12.04
 # Let's install go just like Docker (from source).
 RUN apt-get update -q
-RUN apt-get install -qy build-essential curl git
+RUN DEBIAN_FRONTEND=noninteractive apt-get install -qy build-essential curl git
 RUN curl -s https://go.googlecode.com/files/go1.2.src.tar.gz | tar -v -C /usr/local -xz
 RUN cd /usr/local/go/src && ./make.bash --no-clean 2>&1
 ENV PATH /usr/local/go/bin:$PATH