Replace gitter with zulip

Author: manics

README.md

@@ -9,7 +9,7 @@
 <br/>
 [![GitHub](https://img.shields.io/badge/issue_tracking-github-blue?logo=github)](https://github.com/jupyterhub/zero-to-jupyterhub-k8s/issues)
 [![Discourse](https://img.shields.io/badge/help_forum-discourse-blue?logo=discourse)](https://discourse.jupyter.org/c/jupyterhub/z2jh-k8s)
-[![Gitter](https://img.shields.io/badge/social_chat-gitter-blue?logo=gitter)](https://gitter.im/jupyterhub/jupyterhub)
+[![Zulip](https://img.shields.io/badge/zulip-join_chat-blue.svg)](https://jupyter.zulipchat.com/#narrow/channel/469744-jupyterhub)
 [![Contribute](https://img.shields.io/badge/I_want_to_contribute!-grey?logo=jupyter)](https://github.com/jupyterhub/zero-to-jupyterhub-k8s/blob/HEAD/CONTRIBUTING.md)
 
 This repo contains a _Helm chart_ for JupyterHub and a guide to use it. Together

docs/source/administrator/upgrading/index.md

@@ -11,7 +11,7 @@ then follow [](helm-upgrade-command).
 Major releases may contain breaking changes, and will often require changes to your configuration.
 They have dedicated instructions for upgrading your deployment in addition to the general instructions on this page.
 
-For additional help, feel free to reach out to us on [gitter](https://gitter.im/jupyterhub/jupyterhub)
+For additional help, feel free to reach out to us on [Zulip](https://jupyter.zulipchat.com/#narrow/channel/469744-jupyterhub)
 or the [Discourse forum](https://discourse.jupyter.org/).
 
 (upgrading-major-upgrades)=

docs/source/index.md

@@ -16,8 +16,8 @@ This project is under active development so information and tools may
 change. *You can be a part of this change!* If you see anything that is
 incorrect or have any questions, feel free to post on the community
 [Discourse forum](https://discourse.jupyter.org/) or reach out in the
-[Gitter chat](https://gitter.im/jupyterhub/jupyterhub) or create an
-issue at the [issues
+[Zulip chat](https://jupyter.zulipchat.com/#narrow/channel/469744-jupyterhub)
+or create an issue at the [issues
 page](https://github.com/jupyterhub/zero-to-jupyterhub-k8s/issues). If
 you have tips or deployments that you would like to share, see the
 [Community Resources section](community-resources).

jupyterhub/README.md

@@ -3,7 +3,7 @@
 [![Documentation](https://img.shields.io/badge/Documentation-z2jh.jupyter.org-blue?logo=read-the-docs&logoColor=white)](https://z2jh.jupyter.org)
 [![GitHub](https://img.shields.io/badge/Source_code-github-blue?logo=github&logoColor=white)](https://github.com/jupyterhub/zero-to-jupyterhub-k8s)
 [![Discourse](https://img.shields.io/badge/Help_forum-discourse-blue?logo=discourse&logoColor=white)](https://discourse.jupyter.org/c/jupyterhub/z2jh-k8s)
-[![Gitter](https://img.shields.io/badge/Social_chat-gitter-blue?logo=gitter&logoColor=white)](https://gitter.im/jupyterhub/jupyterhub)
+[![Zulip](https://img.shields.io/badge/zulip-join_chat-blue.svg)](https://jupyter.zulipchat.com/#narrow/channel/469744-jupyterhub)
 <br>
 [![Latest stable release of the Helm chart](https://img.shields.io/badge/dynamic/json.svg?label=Latest%20stable%20release&url=https://hub.jupyter.org/helm-chart/info.json&query=$.jupyterhub.stable&logo=helm&logoColor=white)](https://jupyterhub.github.io/helm-chart#jupyterhub)
 [![Latest pre-release of the Helm chart](https://img.shields.io/badge/dynamic/json.svg?label=Latest%20pre-release&url=https://hub.jupyter.org/helm-chart/info.json&query=$.jupyterhub.pre&logo=helm&logoColor=white)](https://jupyterhub.github.io/helm-chart#development-releases-jupyterhub)

jupyterhub/templates/NOTES.txt

@@ -22,7 +22,7 @@
 
   - Documentation:  https://z2jh.jupyter.org
   - Help forum:     https://discourse.jupyter.org
-  - Social chat:    https://gitter.im/jupyterhub/jupyterhub
+  - Social chat:    https://jupyter.zulipchat.com/#narrow/channel/469744-jupyterhub
   - Issue tracking: https://github.com/jupyterhub/zero-to-jupyterhub-k8s/issues
 
 ### Post-installation checklist