fix: check if there is an existing namespace before creating one
Description
As stated in https://github.com/skonves/express-http-context/issues/26#issuecomment-859488026, if the library is required in two different dependences, the code creates a new namespaces without checking if there is already an existing one. If the endpoint request travels through both of this dependencies, the context will be lost in the middle
Solves https://github.com/skonves/express-http-context/issues/26
Changes
fix: check if there is an existing namespace before creating one
Description
As stated in https://github.com/skonves/express-http-context/issues/26#issuecomment-859488026, if the library is required in two different dependences, the code creates a new namespaces without checking if there is already an existing one. If the endpoint request travels through both of this dependencies, the context will be lost in the middle