[10.x] Configurable storage path via environment variable

[sl0wik]

In the current implementation, the storage directory is statically set to storage. Given that this directory requires write permissions, it poses challenges in serverless environments and other scenarios where the filesystem might be read-only.

To enhance Laravel's adaptability to diverse hosting environments, this pull request introduces the capability to override the default storage directory using the STORAGE_PATH environment variable.

[taylorotwell]

You can just call useStoragePath to customize the storage path.

[sl0wik]

That's what I do but then creating a package requires forking the entire project. I assume there must be some reason to keep this variable static. Thanks for checking anyway.

[taylorotwell]

Can you just check $_ENV directly instead of using Env::get?

[sl0wik]

I used Env::get because similar methods in the same file using it (like methods behind APP_SERVICES_CACHE and APP_PACKAGES_CACHE). I can change it to _ENV if you prefer.