Add erlang repo with apt-add-repository

Dockerfile

@@ -22,6 +22,7 @@ RUN export DEBIAN_FRONTEND=noninteractive && \
     echo 'LANGUAGE="en_US:en"' >> /etc/default/locale && \
     locale-gen en_US.UTF-8 && \
     update-locale en_US.UTF-8 && \
+    apt-key adv --fetch-keys https://packages.erlang-solutions.com/ubuntu/erlang_solutions.asc && \
     apt-key adv --fetch-keys https://packagecloud.io/github/git-lfs/gpgkey && \
     apt-add-repository -y -s 'deb https://packagecloud.io/github/git-lfs/ubuntu/ trusty main' && \
     add-apt-repository -y ppa:ondrej/php && \
@@ -30,6 +31,7 @@ RUN export DEBIAN_FRONTEND=noninteractive && \
     add-apt-repository -y ppa:rwky/graphicsmagick && \
     add-apt-repository -y ppa:deadsnakes/ppa && \
     add-apt-repository -y ppa:kelleyk/emacs && \
+    apt-add-repository -y 'deb https://packages.erlang-solutions.com/ubuntu trusty contrib' && \
     apt-get -y update && \
     apt-get install -y --no-install-recommends \
         advancecomp \
@@ -42,6 +44,8 @@ RUN export DEBIAN_FRONTEND=noninteractive && \
         cmake \
         curl \
         emacs25-nox \
+        esl-erlang \
+        elixir \
         expect \
         fontconfig \
         fontconfig-config \
@@ -394,19 +398,6 @@ ENV GIMME_GO_VERSION "1.10"
 ENV GIMME_ENV_PREFIX "/opt/buildhome/.gimme/env"
 RUN gimme
 
-################################################################################
-#
-# Erlang+Elixir
-#
-################################################################################
-USER root
-# Erlang solutions repository
-RUN wget https://packages.erlang-solutions.com/erlang-solutions_1.0_all.deb && \
-    dpkg -i erlang-solutions_1.0_all.deb
-RUN apt-get update
-RUN apt-get install -y esl-erlang elixir
-
-
 # Cleanup
 USER root