can't clone or push with ssh

First of all, I really appreciate your working!

I build gitlab container with docker-compose.yml. The key config is as follows.

gitlab:
    ports:
    - "10080:80"
    - "10022:22"
    - "10443:443"
environment
    - GITLAB_HOST=git.ifeixiu.com
    - GITLAB_PORT=443
    - GITLAB_SSH_PORT=22

This is my nginx.conf .

    server {
        listen      80;
        server_name  git.ifeixiu.com;
        rewrite ^(.*) https://$server_name$1 permanent;
    }

    server {
        listen       443;
        server_name  git.ifeixiu.com;

        ssl on;
        ssl_certificate "/usr/local/etc/nginx/git-ifeixiu-com.pem";
        ssl_certificate_key "/usr/local/etc/nginx/git-ifeixiu-com.key";
        ssl_session_cache shared:SSL:1m;
        ssl_session_timeout  10m;
        ssl_ciphers HIGH:!aNULL:!MD5;
        ssl_prefer_server_ciphers on;

        location / {
            # The IP of my vps is 47.91.164.148
            proxy_pass http://47.91.164.148:10080;
            proxy_set_header Host $host;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_set_header X-Forwarded-Proto https;
            proxy_set_header X-Forwarded-Ssl on;
        }
    }

Everything works well.

However, I meet a problem when I clone a repository.

dongpeihideMBP2:ccc urmyc$ git clone git@git.ifeixiu.com:ocean7/FeixiuAndroid.git
Cloning into 'FeixiuAndroid'...
git@git.ifeixiu.com's password: 

I've already add my SSH key to my profile. Why do I have to type in the password? And I don't know what the password exactly is.

looking forward to your help~

Start with docker-compose.yml and nginx.conf, then compare the configured SSH port with the published port and the clone URL. Reproduce clone and push with the configured key while checking the relevant container and SSH connection output. Done means SSH authentication succeeds and both clone and push work through the advertised repository URL.