Sending POST requests with curl
curl --header "Content-Type: application/json" \
--insecure \
--data '{"foo": "bar"}' \
https://example.docker.localhost/webhook
--request POST is implied if --data is passed.
--insecure skips SSL validation, e.g. if using a self-signed certificate.
Also, from man curl:
--json works as a shortcut for passing on these three options:
--data [arg]
--header "Content-Type: application/json"
--header "Accept: application/json"