I have a ballpark idea of how the ELK stack works. I read that by default, standard output is captured and that output will make its way to the Elasticsearch repository. If I post something to stdout, that content piece will be when visualized with Kibana in one field called "message".
So, besides the title which was anyway getting too long, here's the additional ask. How do I send a structured message, JSON I guess? How do I configure it? I read that it is possible, but I have some difficulties piecing it together. There's something about a JSON template that needs to be registered somewhere, but I lack a clear example.