[2.x] Adds health check endpoint

src/Contracts/HealthCheckController.php

@@ -0,0 +1,15 @@
+<?php
+
+namespace Laravel\Vapor\Contracts;
+
+use Illuminate\Http\Request;
+
+interface HealthCheckController
+{
+    /**
+     * Respond to a health check request.
+     *
+     * @return \Illuminate\Http\Response
+     */
+    public function __invoke(Request $request);
+}

src/DefinesRoutes.php

@@ -23,5 +23,12 @@ public function ensureRoutesAreDefined()
                 Contracts\SignedStorageUrlController::class.'@store'
             )->middleware(config('vapor.middleware', 'web'));
         }
+
+        if (config('vapor.health_check', true)) {
+            Route::get(
+                '/vapor/health-check',
+                Contracts\HealthCheckController::class
+            )->middleware(config('vapor.middleware', 'web'));
+        }
     }
 }

src/Http/Controllers/HealthCheckController.php

@@ -0,0 +1,20 @@
+<?php
+
+namespace Laravel\Vapor\Http\Controllers;
+
+use Illuminate\Http\Request;
+use Illuminate\Routing\Controller;
+use Laravel\Vapor\Contracts\HealthCheckController as HealthCheckControllerContract;
+
+class HealthCheckController extends Controller implements HealthCheckControllerContract
+{
+    /**
+     * Respond to a health check request.
+     *
+     * @return \Illuminate\Http\Response
+     */
+    public function __invoke(Request $request)
+    {
+        return response('OK');
+    }
+}

src/VaporServiceProvider.php

@@ -13,6 +13,7 @@
 use Laravel\Vapor\Console\Commands\VaporHealthCheckCommand;
 use Laravel\Vapor\Console\Commands\VaporQueueListFailedCommand;
 use Laravel\Vapor\Console\Commands\VaporWorkCommand;
+use Laravel\Vapor\Http\Controllers\HealthCheckController;
 use Laravel\Vapor\Http\Controllers\SignedStorageUrlController;
 use Laravel\Vapor\Http\Middleware\ServeStaticAssets;
 use Laravel\Vapor\Queue\VaporConnector;
@@ -70,6 +71,11 @@ public function register()
             SignedStorageUrlController::class
         );
 
+        $this->app->singleton(
+            Contracts\HealthCheckController::class,
+            HealthCheckController::class
+        );
+
         $this->configure();
         $this->offerPublishing();
         $this->ensureAssetPathsAreConfigured();