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Create a self-signed SSL certificate for React JS, before starting to explore, I want to add a little bit about this A self-signed certificate is a digital certificate that is created and signed by the same entity it identifies. Unlike certificates issued by trusted Certificate Authorities (CAs), self-signed certificates aren't verified by external parties. They're commonly used for local development, testing, or internal systems where the identity verification provided by a CA is not necessary. Although self-signed certificates can secure communication, they lack the third-party validation provided by CA-signed certificates, and users may encounter browser warnings when accessing websites using self-signed certificates. it will done in a few steps there are lots of ways to create a Self-signed certificate but I am using here mkcert you can visit this URL  https://chocolatey.org/install#individual and download the steps to install Chocolatey , if you don't want to visit it