$ curl -v -H 'Content-Type: application/json' -X POST -H "id:" -d '{"input":"foo"}' http://localhost:8080/hello
Note: Unnecessary use of -X or --request, POST is already inferred.
*   Trying 127.0.0.1:8080...
* Connected to localhost (127.0.0.1) port 8080 (#0)
> POST /hello HTTP/1.1
> Host: localhost:8080
> User-Agent: curl/7.85.0
> Accept: */*
> Content-Type: application/json
> Content-Length: 15
> 
* Mark bundle as not supporting multiuse
< HTTP/1.1 200 OK
< Accept: */*
< Accept: */*
< User-Agent: curl/7.85.0
< User-Agent: Vert.x-WebClient/4.2.7.redhat-00003
< User-Agent: curl/7.85.0
< Content-Length: 17
< Content-Type: [application/json, application/json]
< 
* Connection #0 to host localhost left intact