docker/l3d#105 Also set new client host env variable in addition to remote...

docker/l3d#105 Also set new client host env variable in addition to remote host - and explicitly define `/dev/null` as destination for the xdebug log

templates/docker-compose.yml.twig

@@ -40,6 +40,8 @@ services:
       PHP_XDEBUG_MAX_NESTING_LEVEL: 512
       PHP_XDEBUG_MODE: debug
       PHP_XDEBUG_REMOTE_HOST: {{ docker0.ip }}
+      PHP_XDEBUG_CLIENT_HOST: {{ docker0.ip }}
+      PHP_XDEBUG_LOG: /dev/null
       PHP_XDEBUG_START_WITH_REQUEST: 1
       PHP_IDE_CONFIG: serverName=Docker
       DRUSH_ALLOW_XDEBUG: 1