The first step to build a wapi.js based chat bot is to create a new node.js project. You can quickly setup a new project using the utility NPM package provided with the wapi.js SDK only, run the following command in your terminal to setup the project:
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pnpm create-wapi-app my-whatsapp-bot
Once you run this command, you would be asked a couple of questions like the name of the project and whether you want to use typescript or javascript for this project. Once you answer them, you project will start to setup and once done. You can navigate to the project directory and start building your chat bot.