Add .gitignore to php-worker (#1780)

* Add .gitignore
* Change file to example.

php-worker/supervisord.d/.gitignore

@@ -0,0 +1 @@
+*.conf

php-worker/supervisord.d/laravel-worker.conf → php-worker/supervisord.d/laravel-worker.conf.example

@@ -4,4 +4,4 @@ command=php /var/www/artisan queue:work --sleep=3 --tries=3 --daemon
 autostart=true
 autorestart=true
 numprocs=8
-redirect_stderr=true
+redirect_stderr=true