Fracada requires only blockfrost credentials as environment variables. These are defined in env.js:
const BLOCKFROST_API_URL = process.env.NEXT_PUBLIC_BLOCKFROST_API_URL || '';
const BLOCKFROST_PROJECT_ID = process.env.NEXT_PUBLIC_BLOCKFROST_PROJECT_ID || '';
const NETWORK_NAME = process.env.NEXT_PUBLIC_NETWORK_NAME || 'Preprod';