This is the tutorial from DApp Univeristy which is configured to work on harmony blockchain.

Video Tutorial

Steps

Fund your public key with test ONE tokens (faucet)
Update truffle-config.js, replace with your private key
npm install
truffle compile
truffle migrate --reset --network testnet
npm start which should popup http://localhost:3000/ page
make sure to connect metamask to harmony testnet, as the marketplace contracts are deployed on harmony testnet (instructions)