Appl standard readme format

README.md

@@ -1,9 +1,13 @@
 # Mattermost Docker
+The official Docker deployment solution for Mattermost.
 
-## Deploying
+## Install & Usage
 
-Follow the steps in [our guide](https://docs.mattermost.com/guides/deployment.html) to deploy Mattermost on Docker.
+Refer to the [Mattermost Docker deployment guide](https://docs.mattermost.com/install/install-docker.html) for instructions on how to install and use this Docker image.
+
+## Contribute
+PRs are welcome, refer to our [contributing guide](https://developers.mattermost.com/contribute/getting-started/) for an overview of the Mattermost contribution process.
 
 ## Upgrading from `mattermost-docker`
 
-This repository replaces the [deprecated mattermost-docker repository](https://github.com/mattermost/mattermost-docker>). For an in-depth guide to upgrading, please refer to [this document](https://github.com/mattermost/docker/blob/main/scripts/UPGRADE.md). For additional help with upgrading, please contact us on [this issue](https://github.com/mattermost/mattermost-docker/issues/489>).
+This repository replaces the [deprecated mattermost-docker repository](https://github.com/mattermost/mattermost-docker>). For an in-depth guide to upgrading, please refer to [this document](https://github.com/mattermost/docker/blob/main/scripts/UPGRADE.md).