Update Dockerfile to pull go from googlecode

Dockerfile

@@ -4,15 +4,25 @@ FROM ubuntu:12.04
 
 MAINTAINER Michael Crosby http://crosbymichael.com
 
-RUN echo "deb http://archive.ubuntu.com/ubuntu precise main universe" > /etc/apt/sources.list
 RUN apt-get update
 RUN apt-get upgrade -y
 
+ADD https://go.googlecode.com/files/go1.1.2.linux-amd64.tar.gz /opt/go.tar.gz
+
+RUN                                       \
+  cd /opt                                ;\
+  tar xvvf go.tar.gz                     ;\
+  rm go.tar.gz                           ;\
+  ln -s /opt/go/bin/go /usr/local/bin/go ;\
+#RUN
+
+ENV GOROOT /opt/go
+
 ADD . /app/
 
 WORKDIR /app/
 
-RUN apt-get install -y golang-go && go build dockerui.go
+RUN go build dockerui.go
 
 EXPOSE 9000
 ENTRYPOINT ["./dockerui"]