Add Tailchat to Communication - Custom Communication Systems (#3878)

Co-authored-by: Rabenherz112 <rabenherz@theravenhub.com>

README.md

@@ -373,6 +373,7 @@ _See also: [Comparison of CalDAV and CardDAV implementations - Wikipedia](https:
 - [StoneAge Messenger](https://cweb.gitlab.io/StoneAge.html) - A self-hosted Android messenger, S3-compatible storage is the only backend needed. ([Source Code](https://gitlab.com/cweb-repos/cweb-conversations), [Clients](https://f-droid.org/en/packages/com.cweb.messenger/)) `GPL-3.0` `Java`
 - [Synapse](https://matrix.org/docs/projects/server/synapse) - Server for [Matrix](https://matrix.org/), an open standard for decentralized persistent communication. ([Source Code](https://github.com/matrix-org/synapse)) `Apache-2.0` `Python`
 - [Syndie](https://syndie.de) - Syndie is a libre system for operating distributed forums. `CC0-1.0` `Java`
+- [Tailchat](https://tailchat.msgbyte.com/) - Next generation noIM application in your own workspace, not only another Slack/Discord/rocket.chat. ([Demo](https://nightly.paw.msgbyte.com/), [Source Code](https://github.com/msgbyte/tailchat)) `Apache-2.0` `Docker`
 - [TextBelt](https://github.com/typpo/textbelt) `⚠` - Outgoing SMS API that uses carrier-specific gateways to deliver your text messages for free, and without ads. `MIT` `Javascript`
 - [Tiledesk](https://tiledesk.com) - All-in-one customer engagement platform from lead-gen to post-sales, from WhatsApp to your website. With omni-channel live agents and AI-powered chatbots. Self hosted alternative to Intercom, Zendesk, Tawk.to and Tidio. ([Source Code](https://github.com/Tiledesk/tiledesk)) `MIT` `Docker/K8S`
 - [Tinode](https://github.com/tinode) - Instant messaging platform. Backend in Go. Clients: Swift iOS, Java Android, JS webapp, scriptable command line; chatbots. ([Demo](https://sandbox.tinode.co/), [Source Code](https://github.com/tinode/chat), [Clients](https://github.com/tinode/webapp)) `GPL-3.0` `Go`