Hassio install with nginx-proxy companion

Hey there guys,

Long-time follower, but first-time poster here.

I first installed Hassio on a raspberry Pi, using the provided image and everything worked smoothly and perfectly.

However, this time I decided to go with the hard way. A little context first, I bought a HP Desktop to act as server for various functions, but primarily as a Hassio Server and a small web server for two wordpress instances.

So, I setup the desktop with ubuntu server (since I’ll be running headless), docker, docker-compose and everything else that I needed.

I got hassio running with the supervised installer and configured a few services just to check correct functionality.

Next I used this code (blog.ssdnodes.com) to setup a nginx-proxy so that I would be able to run all the instances needed.

version: '3'

services:
  nginx:
    image: nginx:1.13.1
    container_name: nginx-proxy
    ports:
      - "80:80"
      - "443:443"
    volumes:
      - conf:/etc/nginx/conf.d
      - vhost:/etc/nginx/vhost.d
      - html:/usr/share/nginx/html
      - certs:/etc/nginx/certs
    labels:
      - "com.github.jrcs.letsencrypt_nginx_proxy_companion.nginx_proxy=true"

  dockergen:
    image: jwilder/docker-gen:0.7.3
    container_name: nginx-proxy-gen
    depends_on:
      - nginx
    command: -notify-sighup nginx-proxy -watch -wait 5s:30s /etc/docker-gen/templates/nginx.tmpl /etc/nginx/conf.d/default.conf
    volumes:
      - conf:/etc/nginx/conf.d
      - vhost:/etc/nginx/vhost.d
      - html:/usr/share/nginx/html
      - certs:/etc/nginx/certs
      - /var/run/docker.sock:/tmp/docker.sock:ro
      - ./nginx.tmpl:/etc/docker-gen/templates/nginx.tmpl:ro

  letsencrypt:
    image: jrcs/letsencrypt-nginx-proxy-companion
    container_name: nginx-proxy-le
    depends_on:
      - nginx
      - dockergen
    environment:
      NGINX_PROXY_CONTAINER: nginx-proxy
      NGINX_DOCKER_GEN_CONTAINER: nginx-proxy-gen
    volumes:
      - conf:/etc/nginx/conf.d
      - vhost:/etc/nginx/vhost.d
      - html:/usr/share/nginx/html
      - certs:/etc/nginx/certs
      - /var/run/docker.sock:/var/run/docker.sock:ro

volumes:
  conf:
  vhost:
  html:
  certs:

# Do not forget to 'docker network create nginx-proxy' before launch, and to add '--network nginx-proxy' to proxied containers. 

networks:
  default:
    external:
      name: nginx-proxy

It runs the wordpress instance perfectly because I can setup with the appropriate Environment variables to create certificates and the nginx redirect.

However, when it comes to Hassio, I am unable to do so, because the installer is standalone, and so I’m unable to access it with my domain.
What I’m asking for is, keeping the current setup, am I able to redirect to hassio in any way?

This might be a very noob question but I’ve scoured the web trying to find the solution, and even scoured to contact the nginx-proxy/docker-letsencrypt-nginx-proxy-companion developer (buchdag), but got no reply.

Thanks in advance for any help provided!!