env: running gitlab.mydomain.com:88 and second nginx on mydomain.com

1. touch /etc/ngnix/sites-enabled/myGitlab
2. content of /etc/ngnix/sites-enabled/myGitlab

   server {  
   	listen 80;
   	servername gitlab.mydomain.com
   
   	location / {
   		proxy_pass  http://gitlab.mydomain.com:88 
   	}
   }

3. then type:

   certbot --nginx

4. install certificate for gitlab.mydomain.com
5. edit nano /etc/gitlab/gitlab.rb
6. set external_url to gitlab:mydomain.com without port

   external_url 'http://gitlab.mydomain.com'

7. set nginx['listen_port'] to 88

   nginx['listen_port'] = 88

8. then type gitlab-ctl reconfigure
9. then type gitlab-ctl restart nginx
10. https://gitlab.mydomain.com is now working :)
11. ekhem, dont forget about runners regression (read below)
12. ekhem 2, dont forget about SPF record! (must be sepearted for each domain). Example for/etc/bind/zones/mydomain.file

    @       IN      TXT     "v=spf1 a mx include:_spf.google.com ~all"
    gitlab  IN      TXT     "v=spf1 a mx include:_spf.google.com ~all"
    

RUNNERS!

this config may break all your runners.

example errors 

api/v4/jobs/request: 404 Not Found
api/v4/runners/verify: 401 Unauthorized

1. edit /etc/gitlab-runner/config.toml
2. change url= to  https://gitlab.mydomain.com
3. add clone_url= and set http://giblat.mydomain.com:88  
4. verify token