Prepare a short and general description to show in Docker Hub

ecs/HUB-README.md

@@ -0,0 +1,58 @@
+# ejabberd Community Server Docker Image
+
+## What is ejabberd
+
+[ejabberd][im] is an open-source,
+robust, scalable and extensible realtime platform built using [Erlang/OTP][erlang],
+that includes [XMPP][xmpp] Server, [MQTT][mqtt] Broker and [SIP][sip] Service.
+
+Check the features in [ejabberd.im][im], [ejabberd Docs][features],
+[ejabberd at ProcessOne][p1home], and a list of [supported protocols and XEPs][xeps].
+
+[im]: https://ejabberd.im/
+[erlang]: https://www.erlang.org/
+[xmpp]: https://xmpp.org/
+[mqtt]: https://mqtt.org/
+[sip]: https://en.wikipedia.org/wiki/Session_Initiation_Protocol
+[features]: https://docs.ejabberd.im/admin/introduction/
+[p1home]: https://www.process-one.net/en/ejabberd/
+[xeps]: https://www.process-one.net/en/ejabberd/protocols/
+
+
+## What is `ejabberd/ecs`
+
+This `ejabberd/ecs` Docker image is built for stable ejabberd releases using
+[docker-ejabberd/ecs](https://github.com/processone/docker-ejabberd/tree/master/ecs).
+It's based in Alpine Linux, and is aimed at providing a simple image to setup and configure.
+
+Please report problems related to this `ejabberd/ecs` image packaging in
+[docker-ejabberd Issues](https://github.com/processone/docker-ejabberd/issues),
+and general ejabberd problems in
+[ejabberd Issues](https://github.com/processone/ejabberd/issues).
+
+
+## How to use the ejabberd/ecs image
+
+Please check [ejabberd/ecs README](https://github.com/processone/docker-ejabberd/tree/master/ecs#readme)
+
+
+## Supported Architectures
+
+This `ejabberd/ecs` docker image is built for the `linux/amd64` architecture.
+
+
+## Alternative Image in GitHub
+
+There is another container image published in
+[ejabberd GitHub Packages](https://github.com/processone/ejabberd/pkgs/container/ejabberd),
+that you can download from the GitHub Container Registry.
+
+Its usage is similar to this `ejabberd/ecs` image, with some benefits and changes worth noting:
+
+- it's available for `linux/amd64` and `linux/arm64` architectures
+- it's built also for `master` branch, in addition to the stable ejabberd releases
+- it includes less customizations to the base ejabberd compared to `ejabberd/ecs`
+- it stores data in `/opt/ejabberd/` instead of `/home/ejabberd/`
+
+See its documentation in [CONTAINER](https://github.com/processone/ejabberd/blob/master/CONTAINER.md).
+