Merge pull request #57 from takinbo/version2

fixes #54 switched to using alpine linux v3.7

Author: dodumosu

Dockerfile

@@ -1,11 +1,11 @@
-FROM alpine:3.4
+FROM alpine:3.7
 
 MAINTAINER Tim Akinbo <[email protected]>
 
 ADD . /app/
 RUN set -ex \
         && apk add --no-cache --virtual .build-deps \
-            --repository http://dl-3.alpinelinux.org/alpine/edge/community/ \
+            --repository http://dl-cdn.alpinelinux.org/alpine/v3.7/community/ \
             build-base \
             libxml2-dev \
             libxslt-dev \
@@ -14,7 +14,7 @@ RUN set -ex \
             py-pip \
             linux-headers \
         && apk add --no-cache --virtual .python-deps \
-            --repository http://dl-3.alpinelinux.org/alpine/edge/community/ \
+            --repository http://dl-cdn.alpinelinux.org/alpine/v3.7/community/ \
             python \
             py-setuptools \
             libmagic \