docker - NGINX Proxy + Let's encrypt - nginx

Question

I'm starting with Docker. On start I want to set up simple server on nginx with proxy and SSL (only local on my machine) so I do somethink like this:
version: '2'
services:
nginx-proxy:
image: jwilder/nginx-proxy
container_name: nginx-proxy
ports:
- "80:80"
- "443:443"
volumes:
- ./certs:/etc/nginx/certs:ro
- /etc/nginx/vhost.d
- /var/run/docker.sock:/tmp/docker.sock:ro
- /usr/share/nginx/html
labels:
- com.github.jrcs.letsencrypt_nginx_proxy_companion.nginx_proxy=true
nginx-proxy-ssl:
image: jrcs/letsencrypt-nginx-proxy-companion
container_name: nginx-proxy-ssl
volumes:
- ./certs:/etc/nginx/certs:rw
- /var/run/docker.sock:/var/run/docker.sock:ro
volumes_from:
- nginx-proxy
whoami2:
image: jwilder/whoami
container_name: whoami2
environment:
- VIRTUAL_HOST=vertex.local.com
- LETSENCRYPT_HOST=vertex.local.com
- LETSENCRYPT_EMAIL=contact#vertex.local.com
networks:
default:
external:
name: developer
On standard HTTP everythink is fine, I'm getting site but Let's Encrypt returns error:
Unable to reach http://vertex.local.com/.well-known/acme-challenge/zr0QPZ53RHLRFKy76GX1NKx3lY4GPIaVorH4PT88_Ew: HTTPConnectionPool(host='vertex.local.com', port=80): Max retries exceeded with url: /.well-known/acme-challenge/zr0QPZ53RHLRFKy76GX1NKx3lY4GPIaVorH4PT88_Ew (Caused by NewConnectionError('<urllib3.connection.HTTPConnection object at 0x7ff41fd2e550>: Failed to establish a new connection: [Errno 111] Connection refused',))
So I have question:
For Docker (even locally) I need to set real existing domain? If is true how should I set up my this domain (on provider site - records, etc.) and on local machine?
Or how can I set SSL into my containers?