Description
Inspired by this: #25693
I understand that your application should not be aware of where your configuration come from. However at some point you had to configure it using env variables.
What I was thinking is being able to access env Variables through the container when it is booted.

Sometimes we need to configure a static property of a non service class that will depend on the OS (it might be because of bad design or whatever but still it happens).

Example

// ./src/Kernel.php
public function boot()
{
    parent::boot();

    // NOT WORKING AS IT RETURNS THE DEFAULT VALUE
    MyClass::$staticProperty = $this->getContainer()->getParameter('env(MY_ENV_VARIABLE)');
}

would be nice if we had something like

// ./src/Kernel.php
public function boot()
{
    parent::boot();

    // PROTECTED PROPERTY AS OF TODAY
    MyClass::$staticProperty = $this->getContainer()->getEnv('MY_ENV_VARIABLE');
}

or event just resolve env in the getParameter method.

I don't know if the need is clear enough. Please do not hesitate to tell me otherwise.

WDYT ?