Strapi is an open source headless CMS that provides a customizable content management system and API for your projects. It allows you to manage content in a visual interface and use a REST or GraphQL API to retrieve the data.

A template or theme refers to a pre-designed layout or structure that provides a basic framework for building a specific type of application or website. It typically includes good design, placeholder content and functional features, allowing developers to customize and fill in the details according to their specific needs.

ESLint is a linter for JavaScript that analyzes code to detect and report on potential problems and errors, as well as enforce consistent code style and best practices, helping developers to write cleaner, more maintainable code.