Hi Sugoke, I replied to the email you sent to our support. I believe it went into your spam folder. I responded as follows:
The configuration of environment variables via push to deploy will not be visible inside the container, they only exist during the build and deployment of the app. A useful use for them is to specify the region where the application will be deployed or the memory limit.
To use environment variables that work within your application, you need to create the settings.json file in the application directory or edit it in Galaxy: