stilliard/pure-ftpd: Allow ftp of other docker container?

I have a docker-compose file created that launches 2 services. 1 is prestashop (an online store) which works and the other is the stilliard/pure-ftpd.

I would like to be able to view the contents of the prestashop volume. Can anyone help ?

Here is my docker-compose.yml file (truncated)

```
services:
prestashop:
image: prestashop/prestashop:latest

networks:
- web

volumes:
- prestashop:/var/www/html

ftpd-server:
image: stilliard/pure-ftpd:latest

ports:
- "21:21"
- "20:20"
- "30000-30009:30000-30009"

networks:
- web

environment:
PUBLICHOST: 192.168.1.2
FTP_USER_NAME: "test"
FTP_USER_PASS: "test"
FTP_USER_HOME: "/var/www/html"
restart: on-failure

volumes:
- prestashop:/var/www/html

volumes:
db-data:
prestashop:

```

I am a little stuck. So when somebody FTPs in, i would like them to be able to view and update the /var/www/html from the prestashop volume

Any ideas what I am doing wrong ?

Thanks in advance