cardano-cli transaction build script (NFT Contract Address Creation)

I am trying to send a market.plutus file to test a NFT marketplace to mainnet. I am building the transaction here like this:

cardano-cli transaction build 
--alonzo-era --mainnet 
--tx-in $UTxO-VARIABLE 
--tx-out $CONTRACT-ADDR-VARIABLE+5400011 
--tx-out-datum-hash 67882f9c671cb45fc6990a2d14a20b30bfce29ad99a401c283a100662e6600fb 
--change-address $MY-ADDR-VARIABLE 

Notice how the --metadata-json-file field is empty. It doesn’t let me build it empty of course but I have no idea what goes here or what it should be.