Merge ~valentinviennot/ubuntu-docker-images:update-telegraf-readme into ~ubuntu-docker-images/ubuntu-docker-images/+git/telegraf:edge

[Valentin Viennot]

[Lucas Kanashiro (lucaskanashiro)]

LGTM, +1.

review: Approve

diff --git a/README.md b/README.md
index 0a26910..7e0c2fa 100644
--- a/README.md
+++ b/README.md
@@ -3,21 +3,9 @@
 ## About Telegraf
 
 Telegraf is an agent for collecting, processing, aggregating, and
-writing metrics.
-
-Design goals are to have a minimal memory footprint with a plugin
+writing metrics. Design goals are to have a minimal memory footprint with a plugin
 system so that developers in the community can easily add support for
-collecting metrics.
-
-Telegraf is plugin-driven and has the concept of 4 distinct plugin
-types:
-
-1. Input Plugins collect metrics from the system, services, or 3rd party APIs
-2. Processor Plugins transform, decorate, and/or filter metrics
-3. Aggregator Plugins create aggregate metrics (e.g. mean, min, max, quantiles, etc.)
-4. Output Plugins write metrics to various destinations
-
-Read more on the [telegraf website](https://www.influxdata.com/time-series-platform/telegraf/).
+collecting metrics. Read more on the [Telegraf website](https://www.influxdata.com/time-series-platform/telegraf/).
 
 ## Tags
 
@@ -32,15 +20,18 @@ Read more on the [telegraf website](https://www.influxdata.com/time-series-platf
 ### Docker CLI
 
 ```sh
-$ docker run -d --name telegraf -e TZ=UTC squeakywheel/telegraf:edge
+$ docker run -d --name telegraf -p 30273:9273 -e TZ=Europe/London squeakywheel/telegraf:edge
 ```
 
+Access your Telegraf instance at `localhost:30273`.
+
 #### Parameters
 
 | Parameter | Description |
 |---|---|
-| `-e TZ=UTC` | Timezone, e.g. `Europe/London` |
-| `-v /my/local/telegraf.conf:/etc/telegraf/telegraf.conf` | Mount local configuration file `telegraf.conf` (download this [example file](https://git.launchpad.net/~canonical-server/ubuntu-server-oci/+git/telegraf/plain/examples/config/telegraf.conf)) |
+| `-e TZ=UTC` | Timezone. |
+| `-p 30273:9273` | Expose Telegraf on `localhost:30273`. |
+| `-v /my/local/telegraf.conf:/etc/telegraf/telegraf.conf` | Mount local configuration file `telegraf.conf` (download this [example file](https://git.launchpad.net/~canonical-server/ubuntu-server-oci/+git/telegraf/plain/examples/config/telegraf.conf)). |
 
 #### Testing/Debugging