No way to use letsencrypt with simple docker installation

Today (so I’m using all the last versions) I installed:
Centos 7 with all updates
docker-ce
docker-compose
I configure my docker-compose.yaml in the following way and run docker-compose up -d

version: ‘2.0’
services:
db:
image: mariadb:10.1
container_name: seafile-mysql
environment:
- MYSQL_ROOT_PASSWORD=******** # Requested, set the root’s password of MySQL service.
- MYSQL_LOG_CONSOLE=true
volumes:
- /opt/seafile-mysql/db:/var/lib/mysql # Requested, specifies the path to MySQL data persistent store.
networks:
- seafile-net

memcached:
image: memcached:1.5.6
container_name: seafile-memcached
entrypoint: memcached -m 256
networks:
- seafile-net

seafile:
image: seafileltd/seafile-mc:latest
container_name: seafile
ports:
- “80:80”
- “443:443” # If https is enabled, cancel the comment.
volumes:
- /opt/seafile-data:/shared # Requested, specifies the path to Seafile data persistent store.
environment:
- DB_HOST=db
- DB_ROOT_PASSWD=******* # Requested, the value shuold be root’s password of MySQL service.
- TIME_ZONE=Europe/Rome # Optional, default is UTC. Should be uncomment and set to your local time zone.
- SEAFILE_ADMIN_EMAIL=xxxxxxxxxxxx # Specifies Seafile admin user, default is ‘me@example.com’.
- SEAFILE_ADMIN_PASSWORD=*********** # Specifies Seafile admin password, default is ‘asecret’.
- SEAFILE_SERVER_LETSENCRYPT=true # Whether to use https or not.
- SEAFILE_SERVER_HOSTNAME=xxxxxxx # Specifies your host name if https is enabled.
depends_on:
- db
- memcached
networks:
- seafile-net

networks:
seafile-net:

I found no resolution to letsencrypt error "ValueError: Wrote file to /var/www/challenges/0Czpmth4wuJlJzD0DLesCRayPLRnaHvmAnpBluj8Tno, but couldn’t download "

DNS are okay, firewall is okay.
If I manually install an SSL certificate all works without problems.

I searched on the forum, on google but not resolution.

Any suggestions?

i am not there (need to get my whole seafile to run) but i managed to use traefik reverse proxy, which is pretty easy to setup (v1.x) and does a great job completely automically. way easier than jwilder and nginx.
maybe this is a backup solution for you, if there is none with the seafile letsencrypt.