Moving COPY higher in the nginx Dockerfile

Moving COPY higher in the Dockerfile makes the docker build fail faster if there is an error. No need to create /etc/nginx/conf.d/ manually.

nginx/Dockerfile

@@ -1,6 +1,8 @@
 FROM clearlinux:latest
 MAINTAINER bin.yang@intel.com
 
+COPY default.conf /etc/nginx/conf.d/default.conf
+
 RUN swupd update $swupd_args && \
     swupd bundle-add nginx $swupd_args
 RUN rm -rf /var/lib/swupd
@@ -11,9 +13,8 @@ RUN ln -sf /dev/stdout /var/log/nginx/access.log \
 	&& ln -sf /dev/stderr /var/log/nginx/error.log
 
 RUN mkdir -p /var/lib/nginx/
-RUN mkdir -p /etc/nginx/conf.d
 RUN cp -f /usr/share/nginx/conf/nginx.conf.example /etc/nginx/nginx.conf
-COPY default.conf /etc/nginx/conf.d/default.conf
+
 
 VOLUME /usr/share/nginx/html
 EXPOSE 80