A local test blockchain is running, accessible at HTTP-RPC endpoint http://localhost:8545.
A local test frontend server is running, accessible at http://localhost:3000 (you're seeing this right now).
To start modifying the frontend, edit ./frontend/src/pages/index.tsx
.
To start modifying the smart contracts, add your contracts in ./smart-contracts/contracts
, and update the deploy scripts in ./smart-contracts/scripts
.