Add build

• https://blog.packagecloud.io/debian/debuild/packaging/2015/06/08/buildling-deb-packages-with-debuild/
• https://git.ethitter.com/debian/nginx-build
• https://bitworks.software/en/2018-09-16-gitlab-ci-artifacts-deb-build-primer.html
• https://github.com/theinvisible/openfortigui/blob/master/openfortigui/debian/rules
• https://www.sidorenko.io/post/2016/05/a-short-way-to-a-deb-package/
• http://forums.debian.net/viewtopic.php?f=30&t=129632
  • debuild -uc -us --source-option=--include-binaries --source-option=-isession
  • http://stackoverflow.com/questions/9677971/having-trouble-building-python-deb-package-complain-about-modified-binary

source/debian/rules

 #!/usr/bin/make -f
+
+export DESTROOT=$(CURDIR)/debian/nginx
+
 %:
 	dh $@
 
 override_dh_auto_install:
 	dh_auto_install
-	install etc/default/nginx /etc/default/nginx
-	install etc/init.d/nginx /etc/init.d/nginx
-	install etc/logrotate.d/nginx /etc/logrotate.d/nginx
-	install etc/nginx/ /etc/nginx/
-	install usr/lib/nginx/modules/ /usr/lib/nginx/modules/
-	install -m 0755 ../nginx-build /usr/sbin/nginx
-	install usr/share/doc/nginx/ /usr/share/doc/nginx/
-	install usr/share/nginx/ /usr/share/nginx/
-	install var/cache/nginx/ /var/cache/nginx/
-	install var/log/nginx/ /var/log/nginx/
+	install -D -p etc/default/nginx $(DESTROOT)/etc/default/nginx
+	install -D -p etc/init.d/nginx $(DESTROOT)/etc/init.d/nginx
+	install -D -p etc/logrotate.d/nginx $(DESTROOT)/etc/logrotate.d/nginx
+	install -d -p etc/nginx/ $(DESTROOT)/etc/nginx/
+	install -d -p usr/lib/nginx/modules/ $(DESTROOT)/usr/lib/nginx/modules/
+	install -D -p -m 0755 usr/sbin/nginx $(DESTROOT)/usr/sbin/nginx
+	install -d -p usr/share/doc/nginx/ $(DESTROOT)/usr/share/doc/nginx/
+	install -d -p usr/share/nginx/ $(DESTROOT)/usr/share/nginx/
+	install -d -p var/cache/nginx/ $(DESTROOT)/var/cache/nginx/
+	install -d -p var/log/nginx/ $(DESTROOT)/var/log/nginx/