Added dev.to blog post link

README.md

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-**openapi-url-resolver** is a **lightweight** NPM package that provides a simple and efficient way to resolve server URLs from OpenAPI specifications. It also removes protocols from the resolved URLs and allows you to **easily extract host information from OpenAPI definitions**. This package is ideal for developers working with APIs that conform to the [OpenAPI 3.x specification](https://swagger.io/specification/) and need to extract [server information](https://spec.openapis.org/oas/v3.1.0#server-object) to make API calls.
+**openapi-url-resolver** is a **lightweight** NPM package that provides a simple and efficient way to resolve server URLs from OpenAPI specifications. It also removes protocols from the resolved URLs and allows you to **easily extract host information from OpenAPI definitions**. This package is ideal for developers working with APIs that conform to the [OpenAPI 3.x specification](https://swagger.io/specification/) and need to extract [server information](https://spec.openapis.org/oas/v3.1.0#server-object) to make API calls. Check out the blog post for more details—[How to resolve server URLs containing variables in OpenAPI 3.x definitions?](https://dev.to/vinitshahdeo/how-to-resolve-server-urls-containing-variables-in-openapi-3x-definitions-kaj)
 
 ### Features: