* add value to email template
* add value to default template
* update test string
* test: fix ngalert test suite
* test: run CI
Co-authored-by: gillesdemey <gilles.de.mey@gmail.com>
This commit adds contact point testing to ngalerts via a new API
endpoint. This endpoint accepts JSON containing a list of
receiver configurations which are validated and then tested
with a notification for a test alert. The endpoint returns JSON
for each receiver with a status and error message. It accepts
a configurable timeout via the Request-Timeout header (in seconds)
up to a maximum of 30 seconds.