GitLab Docker and different containers possible virtualhost?

I am working with Docker with a compose where I have an apache with php, a redmine, a portainer to control the containers and I am installing GitLab.

My problem comes in GitLab since by default it forces me to put a port to access and I would like it to go through a route, but I understand that each container has either its Apache or its Nginx since when I throw Apache and php I can still enter redmine and gitlab. How can I do to access GitLab through a route? I have looked at the VirtualHost issue but being in different Docker I do not know how to tell it where to look for the information.

The main problem is that it forces me to put the port whenever a user tries to recover a password, they get the path without the port or clone a repository and have to put it manually.

Greetings and thank you.

I modify the POST

This is my complete docker-compose. I am new to docker and I am learning with each problem that appears.

version: '2'
services:
  php:
    container_name: php
    restart: always
    image: php:7-apache
    ports:
      - "80:80"
      - "443:443"
    volumes:
      - ./html:/var/www/html
      - ./certificados:/etc/ssl/certs
  gitlab:
   image: 'gitlab/gitlab-ce:latest'
   restart: always
   hostname: 'localhost'
   environment:
     GITLAB_OMNIBUS_CONFIG: |
       external_url 'http://localhost/gitlab'
       # Add any other gitlab.rb configuration here, each on its own line
   ports:
     - '32787:80'
     - '32786:443'
     - '32788:22'
   volumes:
     - './config:/etc/gitlab'
     - './logs:/var/log/gitlab'
     - './data:/var/opt/gitlab'
  redmine:
    container_name: redmine
    restart: always
    image: redmine
    ports:
      - "3000:3000"
    volumes:
      - ./redmineData:/usr/src/redmine/files
      - ./redminePlugins:/usr/src/redmine/plugins
      - ./redmineConfig/configuration.yml:/usr/src/redmine/config/configuration.yml
    environment:
      REDMINE_DB_MYSQL: xx
      REDMINE_DB_PASSWORD: xxxxxx
  db:
    image: mysql:5.7
    restart: always
    environment:
      MYSQL_ROOT_PASSWORD: xxxxx
      MYSQL_DATABASE: xxxx
    volumes:
      - ./mysqlData:/var/lib/mysql
  portainer:
    image: portainer/portainer
    restart: always
    ports:
      - "9000:9000"
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock
      - ./portainer_data:/data portainer/portainer

my idea would be to be able to enter this way http://localhost/gitlab

and not with the port http://localhost:32787/gitlab so it works. The main problem is when uploading via ssh or recovering the pass, it sends me the mail without the port.

All the best.

edit 01

docker-compose

version: '2'
services:
  nginx: 
    image: nginx:latest
    container_name: servidor_nginx
    depends_on:
      - php
      - redmine
    volumes:
      - ./virtualhost.conf:/etc/nginx/nginx.conf
    ports:
      - 80:80
      - 443:443
  php:
    container_name: php
    restart: always
    image: php:7-apache
    ports:
      - "8080:80"
    volumes:
      - ./html:/var/www/html
  redmine:
    container_name: redmine
    restart: always
    image: redmine
    ports:
      - "3000:3000"
    volumes:
      - ./redmineData:/usr/src/redmine/files
      - ./redminePlugins:/usr/src/redmine/plugins
      - ./redmineConfig/configuration.yml:/usr/src/redmine/config/configuration.yml
    environment:
      REDMINE_DB_MYSQL: db
      REDMINE_DB_PASSWORD: xxxxx
  db:
    image: mysql:5.7
    restart: always
    environment:
      MYSQL_ROOT_PASSWORD: xxxxx
      MYSQL_DATABASE: redmine
    volumes:
      - ./mysqlData:/var/lib/mysql
  portainer:
    image: portainer/portainer
    restart: always
    ports:
      - "9000:9000"
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock
      - ./portainer_data:/data portainer/portainer

virtualhost

events {

}

http {
  error_log /etc/nginx/error_log.log warn;
  client_max_body_size 20m;

  proxy_cache_path /etc/nginx/cache keys_zone=one:500m max_size=1000m;
        server {
            listen 80;
            server_name  localhost;
            location /php {
                proxy_pass         http://php:8080/;
                proxy_redirect     off;
                proxy_set_header   Host $host;
                proxy_set_header X-Forwarded-Proto $scheme;
                proxy_set_header   X-Real-IP $remote_addr;
                proxy_set_header   X-Forwarded-For $proxy_add_x_forwarded_for;
                proxy_set_header   X-Forwarded-Host $http_host;
            }
            location /redmine {
                proxy_pass         http://redmine:3000/;
                proxy_redirect     off;
                proxy_set_header   Host $host;
                proxy_set_header X-Forwarded-Proto $scheme;
                proxy_set_header   X-Real-IP $remote_addr;
                proxy_set_header   X-Forwarded-For $proxy_add_x_forwarded_for;
                proxy_set_header   X-Forwarded-Host $http_host;
            }

        }
    }

When I try this route:

http://localhost/redmine gives me 502 Bad Gateway