[5.8] Read an optional mix asset url from MIX_ASSET_URL env variable

[themsaid]

No description provided.

[danilopinotti]

When caching the configs by artisan command, the env helper does not always return null?
I believe the most ideal is to put this 'namespace' in a configuration file where it uses the env helper

[themsaid]

@danilopinotti thanks, did that :)

[X-Coder264]

IMO, there should be tests for when the repository actually returns some value for the app.mix_url key. Currently all the mock ensures is that the get method gets called with the proper key (but it doesn't return anything).

[laurencei]

Does it have to go into the app.php config file? That is rapidly becoming a "dump all" place to put things.

Wouldnt the view.php config file make more sense in this case? or even create a mix.php file for this plus any future mix related config items?