Document using volume mounts with Docker image (#2205)

Document using volume mounts with Docker image

Work toward #1947.

Re-order phone home and docker shell content.

Co-authored-by: Scott Anderson <sanderson@users.noreply.github.com>

content/influxdb/v2.0/get-started.md

@@ -315,6 +315,33 @@ docker run --name influxdb -p 8086:8086 quay.io/influxdb/influxdb:v2.0.4
 ```
 _To run InfluxDB in [detached mode](https://docs.docker.com/engine/reference/run/#detached-vs-foreground), include the `-d` flag in the `docker run` command._
 
+### Persist data outside the InfluxDB container
+
+1. Create a new directory to store your data in and navigate into the directory.
+
+   ```sh
+   mkdir path/to/influxdb-docker-data-volume && cd $_
+   ```
+2. From within your new directory, run the InfluxDB Docker container with the `--volume` flag to
+   persist data from `/root/.influxdb2/` _inside_ the container to the current working directory in
+   the host file system.
+
+   ```sh
+   docker run \
+       --name influxdb \
+       -p 8086:8086 \
+       --volume $PWD:/root/.influxdbv2 \
+       quay.io/influxdb/influxdb:v2.0.4
+   ```
+
+### Console into the InfluxDB container
+
+To use the `influx` command line interface, console into the `influxdb` Docker container:
+
+```bash
+docker exec -it influxdb /bin/bash
+```
+
 {{% note %}}
 #### InfluxDB "phone home"
 
@@ -330,14 +357,6 @@ docker run -p 8086:8086 quay.io/influxdb/influxdb:v2.0.4 --reporting-disabled
 ```
 {{% /note %}}
 
-### Console into the InfluxDB Container (Optional)
-
-To use the `influx` command line interface, console into the `influxdb` Docker container:
-
-```bash
-docker exec -it influxdb /bin/bash
-```
-
 {{% /tab-content %}}
 <!--------------------------------- END Docker -------------------------------->
 
@@ -453,7 +472,7 @@ If you set up InfluxDB through the UI and want to use the [`influx` CLI](/influx
         -o example-org \
         -t mySuP3rS3cr3tT0keN \
         -a
-      ```  
+      ```
     This configures a new profile named `default` and makes the profile active so your `influx` CLI commands run against this instance. For more detail, see [influx config](/influxdb/v2.0/reference/cli/influx/config/).
 
 2. Learn `influx` CLI commands. To see all available `influx` commands, type `influx -h` or check out [influx - InfluxDB command line interface](/influxdb/v2.0/reference/cli/influx/).