Traefik 2.x and GitLab Docker Setup Returning 404 for GitLab Service

I’ve set up GitLab using Docker and Traefik 2.11 as a reverse proxy, but when I try to access GitLab at https://gitlab.example.com, I get a 404 error. I’m using Docker Compose for both Traefik and GitLab configurations. Traefik is supposed to handle HTTPS requests and route them to GitLab, but it seems like the routing isn’t working as expected.

version: '3'

services:
  traefik:
    image: traefik:v2.11
    container_name: "traefik"
    restart: always
    command:
      - "--api.insecure=true"
      - "--providers.docker"
      - "--providers.docker.exposedByDefault=false"
      - "--providers.docker.network=traefik_web"
      - "--entrypoints.http.address=:80"
      - "--entrypoints.http.http.redirections.entrypoint.to=https"
      - "--entrypoints.http.http.redirections.entrypoint.scheme=https"
      - "--entrypoints.https.address=:443"
      - "--entrypoints.https.http.tls.certResolver=le"
      - "--certificatesresolvers.le.acme.tlschallenge=true"
      - "[email protected]"
      - "--certificatesresolvers.le.acme.storage=/letsencrypt/acme.json"
    ports:
      - "80:80"
      - "443:443"
      - "8080:8080"
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock:ro
      - ./../letsencrypt:/letsencrypt
    networks:
      - web

networks:
  web:
    name: traefik_web

version: '3.7'

services:
  gitlab-main:
    image: 'gitlab/gitlab-ce:latest'
    hostname: "gitlab.skull-music.com"
    container_name: gitlab
    environment:
      GITLAB_OMNIBUS_CONFIG: |
        external_url 'https://gitlab.skull-music.com'
    networks:
      - traefik_web
    labels:
    labels:
      - "traefik.enable=true"
      - "traefik.http.routers.gitlab.rule=Host(`gitlab.skull-music.com`)"
      - "traefik.http.routers.gitlab.entrypoints=https"
      - "traefik.http.routers.gitlab.tls=true"
      - "traefik.http.routers.gitlab.service=gitlab-main"
      - "traefik.http.services.gitlab-main.loadbalancer.server.port=80"
      - "traefik.http.routers.gitlab.tls.certResolver=le"


networks:
  traefik_web:
    name: traefik_web
    external: true

What I’ve tried:

1. Ensuring DNS settings are correct.
2. Checking Traefik and GitLab logs, but there are no obvious errors related to the 404.
3. Verifying that the Traefik network traefik_web is correctly shared between Traefik and GitLab services.
4. I added the line like suggested in the answers.

      - "traefik.http.routers.gitlab.tls.certResolver=le"

Questions:

Is there any misconfiguration in my Docker Compose files that could be causing this issue?
How can I further debug the 404 error when accessing GitLab through Traefik?
Any help or pointers would be greatly appreciated. Thank you!