Install PHPREDIS into Laravel-Horizon docker image

docker-compose.yml

@@ -253,6 +253,7 @@ services:
           - INSTALL_MEMCACHED=${PHP_FPM_INSTALL_MEMCACHED}
           - INSTALL_SOCKETS=${LARAVEL_HORIZON_INSTALL_SOCKETS}
           - INSTALL_CASSANDRA=${PHP_FPM_INSTALL_CASSANDRA}
+          - INSTALL_PHPREDIS=${LARAVEL_HORIZON_INSTALL_PHPREDIS}
       volumes:
         - ${APP_CODE_PATH_HOST}:${APP_CODE_PATH_CONTAINER}
         - ./laravel-horizon/supervisord.d:/etc/supervisord.d