Volume Mount Code of django project in docker swarm so that containers are created across all nodes in the swarm

I am trying to implement docker swarm across 3 nodes(node1(manager), node2(worker), node3(worker)) on Digital Ocean.
I have 2 django servers( python images) running in containers and 1 postgresDb container.

Because the code is in node1 and I had bind mounted a directory in node1. Both the django containers are being created only in node1.

For postgres container I am able to attach a volume (ie. volume mount), so the postgres containers are being spread across the 3 nodes.

The main issue I think is because the code is in node1 and I am hard coding ie bind mounting directory path in node1, these django containers are not being created in other nodes where as for postgres container as I am using a volume its containers are spreading across nodes.

Is there a work around by which I can volume bind the code directory for each of django servers or maybe copy all the code to a volume ? But that does not seem efficient and may take a lot of time as code base grows.

Below I am mentioning my docker-stack.yml file with comments mentioning what I talked about above:

version: "3"
services: 
  tatkal_website:    
    image: sourabhkondapaka/tatkal_website
    restart: on-failure 

    deploy:
      replicas: 3
      update_config:
        parallelism: 2
        delay: 10s

    links:
      - "tatkal_booking_service:bookingService"


    networks:
      - net

    ports: 
      - 8000:8000

    volumes: 
      - ./WebSite/:/home/project/      # Bind mounting ./Website (django server directory)

    depends_on: 
      - db    

    command: >
     sh -c "python3 manage.py makemigrations && python3 manage.py migrate && python3 manage.py runserver 0.0.0.0:8000"

  tatkal_booking_service:

    image: sourabhkondapaka/tatkal_booking_service   
    restart: on-failure 

    ports: 
      - 8001:8000

    volumes: 
      - ./Booking_Service/:/home/project/ #Bind mounting ./Booking_Service (django serverdirectory)

    networks:
      - net


    deploy:
      replicas: 3
      update_config:
        parallelism: 2
        delay: 10s

    depends_on: 
      - db    

    command: >
     sh -c "python3 manage.py makemigrations && python3 manage.py migrate && python3 manage.py runserver 0.0.0.0:8000"  

  db:

    image: sourabhkondapaka/tatkal_postgres_db  
    restart: on-failure 


    networks:
      - net

    deploy:
      replicas: 4
      update_config:
        parallelism: 2
        delay: 10s


    ports: 
      - 7890:5432

    volumes: 
      - data:/var/lib/postgresql/data       # Volume mounted postgres container. So no issues.

  visualizer:
    image: dockersamples/visualizer:stable
    ports:
      - "8080:8080"
    stop_grace_period: 1m30s
    volumes:
      - "/var/run/docker.sock:/var/run/docker.sock"
    deploy:
      placement:
        constraints: [node.role == manager]

networks:
  net:


volumes:
  data:

Source: StackOverflow