First you will need to install the Node.js modules used in this script
npm i @solana/web3.js @metaplex/js axios dotenv
Also create a new file in the directory called .env (literally just a filetype as the name). In the .env file, copy/paste these values and populate them with your values
DISCORD_URL=
PROJECT_ADDRESS=
For DISCORD_URL create a new channel that you want your sales to be posted in, then go to Server Settings > Integrations > Create Webhook. Choose a name/image for it and select the new channel from the drop down then click to Copy the URL and paste it after the '=' for DISCORD_URL
For PROJECT_ADDRESS on the metadata for one of your collection, on the part for creators, copy the address for the first listed creator and paste it after the '=' for PROJECT_ADDRESS
Simply type node sales_bot.js into your console and it'll start monitoring for any new transaction signatures on ME and SolSea and any new sale will be posted in your new channel.