to simplify:
curl --location --request PUT \'https://myserver.com/upload\' \\ --form \'file=@/Users/myname/Desktop/bond.jpg\' \\ --form \'test=test\' <
curl --location --request PUT \'https://myserver.com/upload\' \\ --form \'file=@/Users/myname/Desktop/bond.jpg\' \\ --form \'test=test\'