X-Git-Url: https://git.arvados.org/arvados.git/blobdiff_plain/feb463839301b0b596089e48a981660365d2c4a7..746deaa52d2fda99e9265fe20a9f265d8e6816f0:/README.md

diff --git a/README.md b/README.md
index 419ca15957..5843bb84da 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,7 @@
+[comment]: # (Copyright © The Arvados Authors. All rights reserved.)
+[comment]: # ()
+[comment]: # (SPDX-License-Identifier: CC-BY-SA-3.0)
+
 [Arvados](https://arvados.org) is a free software distributed computing platform
 for bioinformatics, data science, and high throughput analysis of massive data
 sets.  Arvados supports a variety of cloud, cluster and HPC environments.
@@ -15,9 +19,7 @@ Arvados consists of:
 
 ## Quick start
 
-Curoverse maintains an Arvados public cloud demo at
-[https://cloud.curoverse.com](https://cloud.curoverse.com).  A Google account
-is required to log in.
+Veritas Genetics maintains a public installation of Arvados for evaluation and trial use, the [Arvados Playground](https://playground.arvados.org). A Google account is required to log in.
 
 To try out Arvados on your local workstation, you can use Arvbox, which
 provides Arvados components pre-installed in a Docker container (requires
@@ -42,11 +44,11 @@ doc/README.textile for instructions.
 
 ## Community
 
-The [#arvados](irc://irc.oftc.net:6667/#arvados IRC) (Internet Relay Chat)
-channel at the
-[Open and Free Technology Community (irc.oftc.net)](http://www.oftc.net/oftc/)
-is available for live discussion and support.  You can use a traditional IRC
-client or [join OFTC over the web.](https://webchat.oftc.net/?channels=arvados)
+[![Join the chat at https://gitter.im/curoverse/arvados](https://badges.gitter.im/curoverse/arvados.svg)](https://gitter.im/curoverse/arvados?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
+
+The [curoverse/arvados channel](https://gitter.im/curoverse/arvados)
+channel at [gitter.im](https://gitter.im) is available for live
+discussion and support.
 
 The
 [Arvados user mailing list](http://lists.arvados.org/mailman/listinfo/arvados)
@@ -54,7 +56,7 @@ is a forum for general discussion, questions, and news about Arvados
 development.  The
 [Arvados developer mailing list](http://lists.arvados.org/mailman/listinfo/arvados-dev)
 is a forum for more technical discussion, intended for developers and
-contributers to Arvados.
+contributors to Arvados.
 
 ## Development
 
@@ -69,6 +71,10 @@ Instructions for setting up a development environment and working on specific
 components can be found on the
 ["Hacking Arvados" page of the Arvados wiki](https://dev.arvados.org/projects/arvados/wiki/Hacking).
 
+## Contributing
+
+When making a pull request, please ensure *every git commit message* includes a one-line [Developer Certificate of Origin](https://dev.arvados.org/projects/arvados/wiki/Developer_Certificate_Of_Origin). If you have already made commits without it, fix them with `git commit --amend` or `git rebase`.
+
 ## Licensing
 
 Arvados is Free Software.  See COPYING for information about Arvados Free