Docs: Use single-node discovery.type for dev example
For the single node, dev example, the `discovery.type=single-node`[1],[2]
is a perfect fit and makes the example shorter and more self explanatory.
Also expose the transport port, to help with dev use-cases using the
transport client.
[1]
[2]
Relates
@@ -49,7 +49,7 @@ Elasticsearch can be quickly started for development or testing use with the fol
["source","sh",subs="attributes"]
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-docker run -p 9200:9200 -e "http.host=0.0.0.0" -e "transport.host=127.0.0.1" {docker-image}
+docker run -p 9200:9200 -p 9300:9300 -e "discovery.type=single-node" {docker-image}
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endif::[]
