document Preflighted_requests (why do we see 2 requests for PUT, POST and DELETE action)

[praveen-garg]

Long story short

OPTIONS request are very first call for every PUT, POST and DELETE, We need to document it as we are running with CORS

Expected behaviour

Document that its expected, per https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS#Preflighted_requests#Preflighted_requests

Actual behaviour

Docs missing

Steps to reproduce

Observe network calls from browser to server for PUT, POST and DELETE