Move Docker-related files under docker/

Signed-off-by: Andrej Shadura <andrew.shadura@collabora.co.uk>

Dockerfile

@@ -68,7 +68,7 @@ VOLUME /var/lib/mysql
 ADD https://salsa.debian.org/debian/dbconfig-common/-/commit/0908c4892c91917504b9dd15007e8085451c6a2a.diff /tmp/dbconfig-common-tmp-attr-fix.diff
 RUN patch -p1 /usr/sbin/dbconfig-generate-include /tmp/dbconfig-common-tmp-attr-fix.diff
 
-COPY docker-entrypoint.sh configure-app.sh configure-db.sh /opt/
+COPY docker/* /opt/
 ENTRYPOINT /opt/docker-entrypoint.sh
 EXPOSE 80 443
 CMD /usr/bin/supervisord -n