message: postgres has now version 10 everywhere, so no need for edge anymore
diff: @@ -18,7 +18,7 @@ RUN apk update \
  patch \
  procps \
  coreutils \
  - && apk add --no-cache postgresql-dev postgresql-client --repository http://dl-cdn.alpinelinux.org/alpine/edge/main \
  + postgresql-client \
  && apk add nodejs-current nodejs-npm yarn --update-cache --repository http://dl-cdn.alpinelinux.org/alpine/edge/main/ --repository http://dl-cdn.alpinelinux.org/alpine/edge/community/ \
  && rm -rf /var/cache/apk/* \
  && curl -L -o /usr/local/bin/composer https://github.com/composer/composer/releases/download/1.6.5/composer.phar \
  