Add Sentry On-Premise (#1494)

* Add Sentry On-Premise

* Move Sentry On-Premise to #ticketing

README.md

@@ -1273,6 +1273,7 @@ See https://staticsitegenerators.net and https://www.staticgen.com
 - [osTicket](http://osticket.com/) - Manage, organize and archive all your support requests and responses in one place. ([Source Code](https://github.com/osTicket/osTicket)) `GPL-2.0` `PHP`
 - [OTRS](http://www.otrs.com/) - Trouble ticket system for assigning tickets to incoming queries and tracking further communications. ([Source Code](https://github.com/OTRS/otrs)) `AGPL-3.0` `Perl`
 - [Request Tracker](https://www.bestpractical.com/rt/) - An enterprise-grade issue tracking system. ([Source Code](https://github.com/bestpractical/rt)) `GPL-2.0` `Perl`
+- [Sentry On-Premise](https://github.com/getsentry/onpremise) - A powerful error tracking platform with wide language support and a robust API. ([Source Code](https://github.com/getsentry/sentry)) `BSD-3-Clause` `Python/Django`
 - [SIT](http://sit-it.org/) - SCM-agnostic, file-based, offline-first, immutable issue tracker. ([Source Code](https://github.com/sit-it/sit)) `MIT` `Apache-2.0` `Rust`.
 - [TheBugGenie](http://www.thebuggenie.org) - Ticket system with extensive user rights system. ([Source Code](https://github.com/thebuggenie/thebuggenie)) `MPL-2.0` `PHP`
 - [Zammad](https://zammad.org/) - Easy to use but powerful open-source support and ticketing system. ([Source Code](https://github.com/zammad/zammad)) `AGPL-3.0` `Ruby`