While I finish the guide, here are two overviews including installation steps. Check them out:

References:
Topic: Create local Debian repository with Aptl.
Web: http://www.unixmen.com/introducing-aptly-a-debian-repository-management-tool/
File: Aptly, A Debian Repository Management Tool.pdf
Topic: Create local APT repository using installation media (CD-DVD-BluRay) packages:
Web: http://www.unixmen.com/setup-local-apt-repository-using-installation-media-in-debian-8/
File: Setup Local APT Repository Using Installation Media In Debian 8.pdf
Topic: Applications available to create a Debian repository:
Web: https://wiki.debian.org/HowToSetupADebianRepository
File: HowToSetupADebianRepository - Debian Wiki.pdf
