Make dataDogUrl configurable

[jgrumboe]

Hi,

We are using the EU site of Datadog and therefore we would need to send events to https://api.datadoghq.eu.
Could we make the dataDogUrl [1] configurable like apiKey? Maybe with the .com site as default.

Thanks,
Johannes

[1]

datadogEventListener/datadog-event-listener-echo/src/main/kotlin/io/armory/plugin/events/listener/datadog/DataDogEventListenerPlugin.kt

Line 52 in ad80b72

private val dataDogUrl = "https://api.datadoghq.com/"