Merge pull request #11 from xflagstudio/1.6.6e21.0

Upgrade to Elixir 1.6.6 and Erlang/OTP 21.0

Author: sudix

Dockerfile

@@ -1,10 +1,10 @@
 FROM alpine:3.7
 
-ENV ELIXIR_VERSION "1.6.5-otp-20"
-ENV ERLANG_VERSION "20.3"
-ENV ASDF_VERSION   "v0.4.1"
+ENV ELIXIR_VERSION "1.6.6-otp-21"
+ENV ERLANG_VERSION "21.0"
+ENV ASDF_VERSION   "v0.5.0"
 
-RUN apk add --no-cache autoconf bash curl alpine-sdk perl openssl openssh-client openssl-dev ncurses ncurses-dev unixodbc unixodbc-dev python py-pip py-setuptools git ca-certificates nodejs && \
+RUN apk add --no-cache autoconf bash curl alpine-sdk perl openssl openssh-client openssl-dev ncurses ncurses-dev unixodbc unixodbc-dev python py-pip py-setuptools git ca-certificates nodejs libxslt libxml2-utils && \
     export PATH="$HOME/.asdf/bin:$HOME/.asdf/shims:$PATH" && \
     echo "PATH=$HOME/.asdf/bin:$HOME/.asdf/shims:$PATH" >> /root/.profile && \
     git clone https://github.com/asdf-vm/asdf.git ~/.asdf --branch $ASDF_VERSION && \