No files are created in the temp caching folder about dir2cast HOT 3 OPEN

version: "2.3"

# after "docker-compose up" try the following URLs as examples:
# http://localhost:8080/
# http://localhost:8080/test/fixtures/

services:
    web:
        image: nginx:alpine
        restart: unless-stopped
        ports:
            - "5001:80"
        volumes:
            - .:/var/www/html
            - ./docker-compose/nginx/default.conf:/etc/nginx/conf.d/default.conf
        links:
            - php-fpm

    php-fpm:
        image: php:7-fpm-alpine
        restart: unless-stopped
        volumes:
            - .:/var/www/html

            # You could also create a Dockerfile FROM php:7-fpm-alpine which includes these next two
            - ./dir2cast.php:/dir2cast.php
            - ./dir2cast.ini:/dir2cast.ini
            - ./getID3:/getID3

            # You should map a temp folder in otherwise you'll see errors about permission denied mkdir()
            - /tmp:/temp

/var/www/html # ls
CHANGELOG.txt       LICENSE             README.md           books               dir2cast.ini        dir2cast.php        docker-compose      docker-compose.yml  getID3              temp                test                tmp
/var/www/html # cd temp/
/var/www/html/temp # ls -a
.   ..
/var/www/html/temp # cd ..
/var/www/html # cd tmp
/var/www/html/tmp # ls -a
.   ..
/var/www/html/tmp #