Merge pull request #173 from mattermost/install-link

Update Docker install link

Author: cwarnermm

README.md

@@ -6,7 +6,7 @@ The official Docker deployment solution for Mattermost.
 
 ## Install & Usage
 
-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.
+Refer to the [Mattermost Docker deployment guide](https://docs.mattermost.com/deployment-guide/server/deploy-containers.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.