How to fix the problem "Could not resolve hostname" when using Docker - docker

Question

I am trying to set up a Satis installation with the official Docker image composer/satis.
The private repository I have put uses an SSH key with a passphrase.
I use a syntax in the SSH config that allows me to use one key by repository.
When I launch docker-compose up with this file :
version: "3.2"
services:
satis:
image: composer/satis
container_name: satis
hostname: satis
volumes:
- /var/www/html/satis:/build
- /usr/local/bin/composer:/composer/composer
- ~/.ssh/id_my_repo:/root/.ssh/id_my_repo
- ~/.ssh/known_hosts:/root/.ssh/known_hosts
- ~/.ssh/satisConfig.txt:/root/.ssh/config
#- /~/.ssh/known_hosts:/etc/ssh/ssh_known_hosts
environment:
SATIS_CONFIG_FILE: /build/satis.json
COMPOSER_NO_INTERACTION: 1
PRIVATE_REPO_DOMAIN_LIST: bitbucket.org gitlab.com github.com
GIT_SSH_COMMAND: "ssh -v"
ports:
- 8181:80
(Obviously, I replace my real repository name).
and the satis.json file :
{
"name": "myuser/my-satis",
"homepage": "http://my.satis.url",
"repositories": [
{
"type": "vcs",
"url": "git#github.com-my-repo:myuser/my-repo.git",
"name:": "myuser/my-repo",
"options": {
"ssh2": {
"username": "myuser",
"password": "mypassword",
"pubkey_file": "/home/myuser/.ssh/id_my-repo.pub",
"privkey_file": "/home/myuser/.ssh/id_my-repo"
}
}
}
]
}
and my SSH config :
Host github.com-my-repo
Hostname github.com
IdentityFile=/root/.ssh/id_my_repo
Host *
UserKnownHostsFile /root/.ssh/known_hosts
GlobalKnownHostsFile /root/.ssh/known_hosts
IdentitiesOnly yes
ServerAliveInterval 30
ServerAliveCountMax 6
the git command git clone --mirror -- 'git#github.com-mon-repo:myuser/mon-repo.git' '/composer/cache/vcs/git-github.com-mon-repo-myuser-mon-repo.git/' fails with the message :
ssh: Could not resolve hostname github.com-my-repo: Name does not resolve
If I launch this command at the outside of the container, it works...so what can be wrong?
Docker version 20.10.17, build 100c701.
docker-compose version 1.29.2, build 5becea4c
EDIT
I have some slashes before my ~ in front of some of my paths.
I fixed that. Now I have :
debug1: read_passphrase: can't open /dev/tty: No such device or address
debug1: No more authentication methods to try.
git#github.com: Permission denied (publickey).