Add git_update.sh and adjust update/test hooks

app/Actions/BbcodeFormatter.php

@@ -30,6 +30,10 @@ class BbcodeFormatter
 
     private static function build(): array
     {
+        if (app()->environment('testing') && env('BBCODE_FORCE_FAIL')) {
+            throw new \RuntimeException('Unable to initialize BBCode formatter.');
+        }
+
         $configurator = new Configurator();
         $bbcodes = $configurator->plugins->load('BBCodes');
         $bbcodes->addFromRepository('B');

app/Http/Controllers/SystemUpdateController.php

@@ -169,7 +169,7 @@ class SystemUpdateController extends Controller
                 ], 500);
             }
 
-            $phpBinary = PHP_BINARY ?: 'php';
+            $phpBinary = env('SYSTEM_UPDATE_PHP_BINARY') ?: (PHP_BINARY ?: 'php');
             $append("Running migrations (using {$phpBinary})...");
             $migrate = new Process([$phpBinary, 'artisan', 'migrate', '--force'], base_path());
             $migrate->setTimeout(600);