use own php container instead

.drone.yml

@@ -16,21 +16,21 @@ steps:
       - ./bin/setup
 
   - name: code styling
-    image: php
+    image: d.xr.to/php
     commands:
       - ./vendor/bin/php-cs-fixer fix --dry-run src
     depends_on:
       - composer
 
   - name: static analysis
-    image: php
+    image: d.xr.to/php
     commands:
       - ./vendor/bin/phpstan analyse -l max -a config/autoload_with_route.php src
     depends_on:
       - composer
 
   - name: testing
-    image: php
+    image: d.xr.to/php
     commands:
       - ./vendor/bin/phpunit
     depends_on:
@@ -42,4 +42,4 @@ volumes:
       path: /tank/var/composer-cache
 ---
 kind: signature
-hmac: 84afe435279ccb4c4a3b21afd3529f518215997425246e0b94690a80af9f2839
+hmac: 14e6f6584181d960650e6f38c42740c8b9a50d17ba6e61a6177ff824313a0bdd