Allow usage of $_ENV variables in port number

[Teodor]

This has been added to Wappler 4.9.0

Using Global Environment Variables

Intro Environment variables are variables which values change depending on the selected environment - development, staging, production. These are useful as they are defined globally per target and then they can be used in server-side components as a dynamic data. Use cases are - database connections, mailer settings, API Keys, URLs etc. which may be different for your different environments. In our example we will show you how to setup environment variables for your database connections. De…