anchor.diff:  
   ADD install_composer.php /var/www/html/install_composer.php
   
  -ENV S6_OVERLAY_VERSION=v1.19.1.1
  +ENV \
  +  S6_OVERLAY_VERSION=v1.19.1.1 \
  +  NGINX_VERSION 1.13.0 \
  +  NPM_CONFIG_LOGLEVEL info \
  +  NODE_VERSION 7.10.0 \
  +  YARN_VERSION 0.24.4
   
   # ------------------------ add nginx ------------------------
   # Taken from official nginx container Dockerfile
  -ENV NGINX_VERSION 1.13.0
   
   RUN GPG_KEYS=B0F4253373F8F6F510D42178520A9993A1C052F8 \
   	&& CONFIG="\
  
positive.code:     
      && rm /var/www/html/install_composer.php
  
  # ------------------------ add Node / NPM / Yarn ------------------------
  
  ENV NPM_CONFIG_LOGLEVEL info
  ENV NODE_VERSION 7.10.0
  
  RUN addgroup -g 1000 node \
      && adduser -u 1000 -G node -s /bin/sh -D node \
  
negative.code:     && apk del .build-deps \
      && cd .. \
      && rm -Rf "node-v$NODE_VERSION" \
      && rm "node-v$NODE_VERSION.tar.xz" SHASUMS256.txt.asc SHASUMS256.txt \
  
  # ------------------------ add Yarn ------------------------
  
    && apk add --no-cache --virtual .build-deps-yarn curl gnupg tar \
    && for key in \
      6A010C5166006599AA17F08146C2130DFD2497F5 \
    ; do \
  