add aptly to Packaging

- fixes https://github.com/awesome-foss/awesome-sysadmin/issues/193

README.md

@@ -535,6 +535,7 @@ Comparison of NoSQL servers: http://kkovacs.eu/cassandra-vs-mongodb-vs-couchdb-v
 
 ## Packaging
 
+* [aptly](https://www.aptly.info/) - Swiss army knife for Debian repository management. ([Source Code](https://github.com/aptly-dev/aptly)) `MIT` `Go`
 * [fpm](https://github.com/jordansissel/fpm) - Versatile multi format package creator.
 * [omnibus-ruby](https://github.com/chef/omnibus) - Full stack, cross distro packaging software (Ruby).
 * [packman](http://packman.readthedocs.org) - Full stack, cross distro packaging software (Python).