Move output dir to /repository/debian & expose it

We need the output data to be persistent and/or backed-up, and the
right way to do this is to expose it to other containers which use
the --volumes-from option.

The data volume is called /repository rather than /docker to avoid
possible conflict with /docker in other using containers.

Dockerfile

@@ -49,7 +49,7 @@ ENV DEBIAN_FRONTEND newt
 ADD scripts/start.sh /usr/local/sbin/start
 RUN chmod 755 /usr/local/sbin/start
 
-VOLUME ["/docker/keys", "/docker/incoming"]
+VOLUME ["/docker/keys", "/docker/incoming", "/repository"]
 
 EXPOSE 80
 EXPOSE 22

configs/nginx-default.conf

@@ -2,7 +2,7 @@ server {
         listen 80 default_server;
         listen [::]:80 default_server ipv6only=on;
 
-        root /var/www;
+        root /repository/debian;
         index index.html index.htm;
 
         # Make site accessible from http://localhost/

scripts/reprepro-import.sh

@@ -2,7 +2,7 @@
 
 BASEDIR=/var/lib/reprepro
 INCOMING=/docker/incoming
-OUTDIR=/var/www/debian
+OUTDIR=/repository/debian
 
 #
 # Make sure we're in the apt/ directory