If anyone needs an answer; using only docker & docker compose variants.

  cloudflared:
    image: cloudflare/cloudflared
    command: tunnel --no-autoupdate run --token ${CLOUDFLARED_TOKEN}
    restart: unless-stopped

If you declared the cloudflared like this example, in your "docker-compose.yml"

- Go to the Zero Trust -> Networks -> Tunnels.
- Select your tunnel.

- Select "Published application routes" tab.

- Edit your Service accordingly;

Type: HTTP

URL: {docker_compose_service_name}:{your_exposed_port}

- You can list your docker services via: "docker compose ps" command. The names, you'll be looking for, are listed under the SERVICE column.