Fix README links

README.md

@@ -7,7 +7,7 @@ Latest stable version of Graylog is *3.1.3* this Version is available with the t
 [hub]: https://hub.docker.com/r/graylog/graylog/
 [microbadger]: https://microbadger.com/images/graylog/graylog
 
-Use the stable `3.1` release for your production environments. Please check the [latest stable documentation](http://docs.graylog.org/en/stable/pages/installation/docker.html) for complete installation and configuration instruction.
+Use the stable `3.1` release for your production environments. Please check the [latest stable documentation](http://docs.graylog.org/en/latest/pages/installation/docker.html) for complete installation and configuration instruction.
 
 
 ## What is Graylog?
@@ -16,15 +16,15 @@ Graylog is a centralized logging solution that allows the user to aggregate and
 
 ## Architecture
 
-Take a look at the minimal [Graylog architecture](http://docs.graylog.org/en/stable/pages/architecture.html) to get the big picture of a Graylog setup. In essence, Graylog needs to talk to MongoDB to store configuration data as well as Elasticsearch to store the actual log data.
+Take a look at the minimal [Graylog architecture](http://docs.graylog.org/en/latest/pages/architecture.html) to get the big picture of a Graylog setup. In essence, Graylog needs to talk to MongoDB to store configuration data as well as Elasticsearch to store the actual log data.
 
 ## How to use this image
 
-Please refer to the [Graylog Docker documentation](http://docs.graylog.org/en/stable/pages/installation/docker.html) for a comprehensive overview and a detailed description of the Graylog Docker image.
+Please refer to the [Graylog Docker documentation](http://docs.graylog.org/en/latest/pages/installation/docker.html) for a comprehensive overview and a detailed description of the Graylog Docker image.
 
 ## Configuration
 
-Every configuration option can be set via environment variables, take a look [here](http://docs.graylog.org/en/stable/pages/configuration/server.conf.html) for an overview. Simply prefix the parameter name with `GRAYLOG_` and put it all in upper case. Another option would be to store the configuration file outside of the container and edit it directly.
+Every configuration option can be set via environment variables, take a look [here](http://docs.graylog.org/en/latest/pages/configuration/server.conf.html) for an overview. Simply prefix the parameter name with `GRAYLOG_` and put it all in upper case. Another option would be to store the configuration file outside of the container and edit it directly.
 
 ## Documentation