Can containers access each other through Traefik?

Traefik Traefik v2
1

I am using Docker Swarm and stacks to deploy my services. Let's say that I have two services with following docker-compose files.

docker-compose-first.yml

version: "3.7"

services:
  web:
    image: first:1.0.0
    networks:
      - traefik-net
      - notify-net
    deploy:
      replicas: 1
      labels:
        # enable Traefik for this service
        - "traefik.enable=true"
        - "traefik.docker.network=traefik-net"

        # router
        - "traefik.http.routers.first.rule=Host(`first.mydomain.com`)"
        - "traefik.http.routers.first.entrypoints=application"
        - "traefik.http.routers.first.tls=true"
        - "traefik.http.routers.first.service=first"

        # service
        - "traefik.http.services.first.loadbalancer.server.port=443"
        - "traefik.http.services.first.loadbalancer.server.scheme=https"

networks:
  traefik-net:
    external: true
    name: traefik-net
  notify-net:
    external: true
    name: notify-net

docker-compose-second.yml

version: "3.7"

services:
  web:
    image: second:1.0.0
    networks:
      - traefik-net
      - notify-net
    deploy:
      replicas: 1
      labels:
        # enable Traefik for this service
        - "traefik.enable=true"
        - "traefik.docker.network=traefik-net"

        # router
        - "traefik.http.routers.second.rule=Host(`second.mydomain.com`)"
        - "traefik.http.routers.second.entrypoints=application"
        - "traefik.http.routers.second.tls=true"
        - "traefik.http.routers.second.service=second"

        # service
        - "traefik.http.services.second.loadbalancer.server.port=443"
        - "traefik.http.services.second.loadbalancer.server.scheme=https"

networks:
  traefik-net:
    external: true
    name: traefik-net
  notify-net:
    external: true
    name: notify-net

The files are almost the same, differences are in image name, host rule, router and service names. I deployed both stacks using:

  1. docker stack deploy -c docker-compose-first.yml FirstService
  2. docker stack deploy -c docker-compose-second.yml SecondService

Also, I created network notify-net by running docker network create -d overlay --attachable notify-net.

My question: How can I access https://second.mydomain.com:8081/RestApi/Test from the first service (from inside the container)? I want the request to go through Traefik.