Simplified installation process

Configuration process now follows more closely the current instructions for both Elixir and Phoenix installation.

Author: marcelocg

Dockerfile

@@ -11,47 +11,25 @@ ENV LC_ALL en_US.UTF-8
 # update and install some software requirements
 RUN apt-get update && apt-get upgrade -y && apt-get install -y curl wget git make
 
+# For some reason, installing Elixir tries to remove this file
+# and if it doesn't exist, Elixir won't install. So, we create it.
+RUN touch /etc/init.d/couchdb
+
 # download and install Erlang package
 RUN wget http://packages.erlang-solutions.com/erlang-solutions_1.0_all.deb \
  && dpkg -i erlang-solutions_1.0_all.deb \
  && apt-get update
 
-# install erlang from package
-RUN apt-get install -y erlang erlang-ssl erlang-inets && rm erlang-solutions_1.0_all.deb
-
-ENV ELIXIR_VERSION 1.2.3
-# install elixir from source
-RUN git clone https://github.com/elixir-lang/elixir.git && cd elixir && git checkout v$ELIXIR_VERSION && make
-ENV PATH $PATH:/elixir/bin
+# install latest elixir package
+RUN apt-get install -y elixir && rm erlang-solutions_1.0_all.deb
 
 ENV PHOENIX_VERSION 1.1.4
 
-# install Phoenix from source with some previous requirements
-RUN git clone https://github.com/phoenixframework/phoenix.git \
- && cd phoenix && git checkout v$PHOENIX_VERSION \
- && mix local.hex --force && mix local.rebar --force \
- && mix do deps.get, compile \
- && mix archive.install https://github.com/phoenixframework/phoenix/releases/download/v$PHOENIX_VERSION/phoenix_new-$PHOENIX_VERSION.ez --force
-
-# install Node.js and NPM in order to satisfy brunch.io dependencies
-# the snippet below is borrowed from the official nodejs Dockerfile
-# https://registry.hub.docker.com/_/node/
-
-# verify gpg and sha256: http://nodejs.org/dist/v0.12.5/SHASUMS256.txt.asc
-# gpg: aka "Timothy J Fontaine (Work) <[email protected]>"
-# gpg: aka "Julien Gilli <[email protected]>"
-RUN gpg --keyserver pool.sks-keyservers.net --recv-keys 7937DFD2AB06298B2293C3187D33FF9D0246406D 114F43EE0176B71C7BC219DD50A3051F888C628D
-
-ENV NODE_VERSION 0.12.7
-ENV NPM_VERSION 2.12.0
-
-RUN curl -SLO "http://nodejs.org/dist/v$NODE_VERSION/node-v$NODE_VERSION-linux-x64.tar.gz" \
- && curl -SLO "http://nodejs.org/dist/v$NODE_VERSION/SHASUMS256.txt.asc" \
- && gpg --verify SHASUMS256.txt.asc \
- && grep " node-v$NODE_VERSION-linux-x64.tar.gz\$" SHASUMS256.txt.asc | sha256sum -c - \
- && tar -xzf "node-v$NODE_VERSION-linux-x64.tar.gz" -C /usr/local --strip-components=1 \
- && rm "node-v$NODE_VERSION-linux-x64.tar.gz" SHASUMS256.txt.asc \
- && npm install -g npm@"$NPM_VERSION" \
- && npm cache clear
+# install the Phoenix Mix archive
+RUN mix archive.install https://github.com/phoenixframework/archives/raw/master/phoenix_new-$PHOENIX_VERSION.ez
+
+# install Node.js (>= 5.0.0) and NPM in order to satisfy brunch.io dependencies
+# See http://www.phoenixframework.org/docs/installation#section-node-js-5-0-0-
+RUN curl -sL https://deb.nodesource.com/setup_5.x | sudo -E bash - && apt-get install -y nodejs
 
 WORKDIR /code