Implement Keystone environment deployments

app/Http/Requests/StoreEnvironmentVariableRequest.php

@@ -0,0 +1,29 @@
+<?php
+
+namespace App\Http\Requests;
+
+use Illuminate\Foundation\Http\FormRequest;
+
+class StoreEnvironmentVariableRequest extends FormRequest
+{
+    /**
+     * Determine if the user is authorized to make this request.
+     */
+    public function authorize(): bool
+    {
+        return true;
+    }
+
+    /**
+     * Get the validation rules that apply to the request.
+     *
+     * @return array<string, \Illuminate\Contracts\Validation\ValidationRule|array<mixed>|string>
+     */
+    public function rules(): array
+    {
+        return [
+            'key' => ['required', 'string', 'max:255', 'regex:/^[A-Z][A-Z0-9_]*$/'],
+            'value' => ['nullable', 'string'],
+        ];
+    }
+}