update tor

tor/Dockerfile

@@ -2,12 +2,11 @@
 # Dockerfile for tor
 #
 
-FROM alpine
+FROM alpine:edge
 MAINTAINER kev <noreply@easypi.info>
 
 RUN set -xe \
-    && echo 'http://dl-4.alpinelinux.org/alpine/edge/testing' >> /etc/apk/repositories \
-    && apk add -U build-base \
+    && apk add --no-cache build-base \
                           git \
                           gmp-dev \
                           go \
@@ -28,8 +27,7 @@ RUN set -xe \
                git \
                gmp-dev \
                go \
-               python-dev \
-    && rm -rf /var/cache/apk/*
+               python-dev
 
 COPY ./torrc /etc/tor/torrc