anchor.diff:  	&& curl -fSL http://nginx.org/download/nginx-$NGINX_VERSION.tar.gz.asc  -o nginx.tar.gz.asc \
   	&& curl -fSL http://luajit.org/download/LuaJIT-$LUAJIT_VERSION.tar.gz -o LuaJIT-$LUAJIT_VERSION.tar.gz \
   	&& curl -fSL https://github.com/openresty/lua-nginx-module/archive/v$NGINX_LUA_MODULE_VERSION.tar.gz -o lua-nginx-module-v$NGINX_LUA_MODULE_VERSION.tar.gz \
  -	&& curl -fSL https://github.com/pagespeed/ngx_pagespeed/archive/latest-stable.tar.gz -o ngx_pagespeed-latest-stable.tar.gz \
  -	&& curl -fSL https://dl.google.com/dl/page-speed/psol/$NPS_VERSION.tar.gz -o psol.tar.gz \
   	&& git clone https://github.com/cuber/ngx_http_google_filter_module /usr/src/ngx_http_google_filter_module \
   	&& git clone https://github.com/yaoweibin/ngx_http_substitutions_filter_module /usr/src/ngx_http_substitutions_filter_module \
   	&& git clone https://github.com/alexazhou/VeryNginx.git /usr/src/VeryNginx \
   	&& tar -zxC /usr/src -f lua-nginx-module-v$NGINX_LUA_MODULE_VERSION.tar.gz \
   	&& tar -zxC /usr/src -f LuaJIT-$LUAJIT_VERSION.tar.gz \
  -	&& tar -zxC /usr/src -f ngx_pagespeed-latest-stable.tar.gz \
  -	&& tar -zxC /usr/src/ngx_pagespeed-latest-stable -f psol.tar.gz \
   	&& rm lua-nginx-module-v$NGINX_LUA_MODULE_VERSION.tar.gz \
   	&& rm LuaJIT-$LUAJIT_VERSION.tar.gz \
  -	&& rm ngx_pagespeed-latest-stable.tar.gz \
  -	&& rm psol.tar.gz \
     && export GNUPGHOME="$(mktemp -d)" \
   	&& gpg --keyserver ha.pool.sks-keyservers.net --recv-keys "$GPG_KEYS" \
   	&& gpg --batch --verify nginx.tar.gz.asc nginx.tar.gz \
  
positive.code:         --add-module=/usr/src/ngx_http_google_filter_module \
          --add-module=/usr/src/ngx_http_substitutions_filter_module \
          --add-module=/usr/src/lua-nginx-module-$NGINX_LUA_MODULE_VERSION \
  				--add-module=/usr/src/ngx_pagespeed-latest-stable \
  	" \
    && addgroup -S nginx \
  	&& adduser -D -S -h /var/cache/nginx -s /sbin/nologin -G nginx nginx \
  	&& apk add --no-cache --virtual .build-deps \
          gcc \
  
negative.code: 	&& rm -rf /usr/src/nginx-$NGINX_VERSION \
  	&& rm -rf /usr/src/ngx_http_google_filter_module \
  	&& rm -rf /usr/src/ngx_http_substitutions_filter_module \
  	&& rm -rf /usr/src/VeryNginx \
    && rm -rf /usr/src/LuaJIT-$LUAJIT_VERSION \
  	&& rm -rf /usr/src/lua-nginx-module-$NGINX_LUA_MODULE_VERSION \
  