docs: update docker installation docs

docs/sources/installation/docker.md

@@ -36,11 +36,75 @@ $ docker run -d -p 3000:3000 \
 ```
 
 In the above example I map the data folder and sets a configuration option via
-an `ENV` instruction.
+an `ENV` instruction. 
+
+See the [docker volumes documentation](https://docs.docker.com/engine/admin/volumes/volumes/) if you want to create a volume to use with the Grafana docker image instead of a bind mount (binding to a directory in the host system).
 
 ## Configuration
 
-The back-end web server has a number of configuration options. Go the
+All options defined in conf/grafana.ini can be overridden using environment
+variables by using the syntax `GF_<SectionName>_<KeyName>`.
+For example:
+
+```bash
+$ docker run \
+  -d \
+  -p 3000:3000 \
+  --name=grafana \
+  -e "GF_SERVER_ROOT_URL=http://grafana.server.name" \
+  -e "GF_SECURITY_ADMIN_PASSWORD=secret" \
+  grafana/grafana
+```
+
+You can use your own grafana.ini file by using environment variable `GF_PATHS_CONFIG`.
+
+The back-end web server has a number of configuration options. Go to the
 [Configuration]({{< relref "configuration.md" >}}) page for details on all
 those options.
 
+## Installing Plugins for Grafana
+
+Pass the plugins you want installed to docker with the `GF_INSTALL_PLUGINS` environment variable as a comma separated list. This will pass each plugin name to `grafana-cli plugins install ${plugin}`.
+
+```bash
+docker run \
+  -d \
+  -p 3000:3000 \
+  --name=grafana \
+  -e "GF_INSTALL_PLUGINS=grafana-clock-panel,grafana-simple-json-datasource" \
+  grafana/grafana
+```
+
+## Running a Specific Version of Grafana
+
+```bash
+# specify right tag, e.g. 4.5.2 - see Docker Hub for available tags
+$ docker run \
+  -d \
+  -p 3000:3000 \
+  --name grafana \
+  grafana/grafana:4.5.2
+```
+
+## Configuring AWS Credentials for CloudWatch Support
+
+```bash
+$ docker run \
+  -d \
+  -p 3000:3000 \
+  --name=grafana \
+  -e "GF_AWS_PROFILES=default" \
+  -e "GF_AWS_default_ACCESS_KEY_ID=YOUR_ACCESS_KEY" \
+  -e "GF_AWS_default_SECRET_ACCESS_KEY=YOUR_SECRET_KEY" \
+  -e "GF_AWS_default_REGION=us-east-1" \
+  grafana/grafana
+```
+
+You may also specify multiple profiles to `GF_AWS_PROFILES` (e.g.
+`GF_AWS_PROFILES=default another`).
+
+Supported variables:
+
+- `GF_AWS_${profile}_ACCESS_KEY_ID`: AWS access key ID (required).
+- `GF_AWS_${profile}_SECRET_ACCESS_KEY`: AWS secret access  key (required).
+- `GF_AWS_${profile}_REGION`: AWS region (optional).