While developing, you were probably just clicking Run to run your application. As you have noticed, this means that your application runs in the built-in WebLogic server on your local machine. This instance of WebLogic is pre-integrated with JDeveloper, so it contains all necessary libraries and settings for running the ADF applications.
In addition to these built-in WebLogic instances, your development server administrator must set up at least a test/integration server where you can collect all the components of the application for integration testing. Your environment might also include pre-production or other WebLogic server instances before the final production environment.
A minimum environment would use: