feat: load dotenv example

[duaneadam]

Changes

Add a button to load .env.example from the Git source (GitHub). This only works for resources that are applications.

The Thought Process

Why load from GitHub instead of loading from Coolify itself? A few reasons..

Doing the alternative requires the app to be deployed first. Coolify fetches the app during deploy process.

1. For new apps: You add env variables during the setup of your app, which means the app is not deployed on Coolify yet (it fetches after first deploy).
2. For existing apps: Similar case, you'd want to load new env variable before you deploy. Else, build will fail/throw errors (e.g: you have something like T3 Env).

Demo

Loading The Env Variables For The First Time

In this demo: I will be using the new app that I added via the seed data and then show me loading its .env.example via the new button.

Loading Existing Env Variables

Misc

In the demo, there is a new application as part of the seed data. I did not include it, but if the core devs think it is good to have, let me know. Either way, just add the below to database/seeders/ApplicationSeeder.php.

Laraval has a pretty long .env.example, I thought it'd make a good example.

Application::create([
    'uuid' => 'laravel-env-example',
    'name' => 'Laravel Example (has .env.example)',
    'fqdn' => 'http://laravel.127.0.0.1.sslip.io',
    'git_repository' => 'laravel/laravel',
    'git_branch' => '11.x',
    'build_pack' => 'nixpacks',
    'ports_exposes' => '8000',
    'environment_id' => 1,
    'destination_id' => 0,
    'destination_type' => StandaloneDocker::class,
    'source_id' => 0,
    'source_type' => GithubApp::class,
]);