Document using a config file through Docker volume (#2207)

Document using InfluxDB config file with Docker volume

Replace quay image with DockerHub

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

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

@@ -311,7 +311,7 @@ Expose port `8086`, which InfluxDB uses for client-server communication over
 the [InfluxDB HTTP API](/influxdb/v2.0/reference/api/).
 
 ```sh
-docker run --name influxdb -p 8086:8086 quay.io/influxdb/influxdb:v2.0.4
+docker run --name influxdb -p 8086:8086 influxdb:2.0.4
 ```
 _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._
 
@@ -331,14 +331,40 @@ _To run InfluxDB in [detached mode](https://docs.docker.com/engine/reference/run
        --name influxdb \
        -p 8086:8086 \
        --volume $PWD:/root/.influxdbv2 \
-       quay.io/influxdb/influxdb:v2.0.4
+       influxdb:2.0.4
    ```
 
+### Configure InfluxDB with Docker
+
+To mount an InfluxDB configuration file and use it from within Docker:
+
+1. [Persist data outside the InfluxDB container](#persist-data-outside-the-influxdb-container).
+
+2. Use the command below to generate the default configuration file on the host file system:
+
+    ```sh
+    $ docker run \
+        --rm influxdb:2.0.4 \
+        influxd print-config > config.yml
+    ```
+
+3. Modify the default configuration, which will now be available under `$PWD`.
+
+4. Start the InfluxDB container:
+
+   ```sh
+   $ docker run -p 8086:8086 \
+         -v $PWD/config.yml:/etc/influxdb2/config.yml:ro \
+         influxdb:2.0.4
+   ```
+
+(Find more about configuring InfluxDB [here](https://docs.influxdata.com/influxdb/v2.0/reference/config-options/).)
+
 ### Console into the InfluxDB container
 
 To use the `influx` command line interface, console into the `influxdb` Docker container:
 
-```bash
+```sh
 docker exec -it influxdb /bin/bash
 ```
 
@@ -352,8 +378,8 @@ information about what data is collected and how it is used.
 To opt-out of sending telemetry data back to InfluxData, include the
 `--reporting-disabled` flag when starting the InfluxDB container.
 
-```bash
-docker run -p 8086:8086 quay.io/influxdb/influxdb:v2.0.4 --reporting-disabled
+```sh
+docker run -p 8086:8086 influxdb:2.0.4 --reporting-disabled
 ```
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