Docker image pushing but my volume not persist – Phpmyadmin

This message to clear up a problem I am having with the use of docker with my php application.

Indeed, I execute locally my dockers images (nginx, phpmyadmin and php with my application) and everything works fine.
However, I use a volume mounted in my container app with php which allows me to be able to modify hot files (without need to build at each edit).

However when I push this image to a repository and I pull it on another desktop, the volume containing my application is not there.

Have you ever faced this concern?

Please find my docker-compose.yml and Dockerfile :

docker-compose.yml

version: "3.7"
services:
  app:
    build:
      args:
        user: web
        uid: 1000
      context: ./
      dockerfile: Dockerfile
    image: myblog
    container_name: myblog-app
    restart: unless-stopped
    working_dir: /var/www/
    volumes:
      - ./:/var/www
    networks:
      - myblog

  db:
    image: mysql:5.7
    container_name: myblog-db
    restart: unless-stopped
    environment:
      MYSQL_DATABASE: ${DB_DATABASE}
      MYSQL_ROOT_PASSWORD: ${DB_PASSWORD}
      MYSQL_PASSWORD: ${DB_PASSWORD}
      MYSQL_USER: ${DB_USERNAME}
      SERVICE_TAGS: dev
      SERVICE_NAME: mysql
    volumes:
      - ./.docker/mysql/database.sql:/docker-entrypoint-initdb.d/init.sql
      - ./.docker/mysql/data:/var/lib/mysql
    networks:
      - myblog

  phpmyadmin:
    depends_on:
      - db
    image: phpmyadmin/phpmyadmin
    restart: always
    ports:
      - 8002:80
    environment:
      PMA_HOST: db
      MYSQL_ROOT_PASSWORD: ${DB_PASSWORD}
    networks:
      - myblog

  nginx:
    image: nginx:alpine
    container_name: myblog-nginx
    restart: unless-stopped
    ports:
      - 8000:80
    volumes:
      - ./:/var/www
      - ./.docker/nginx/conf.d:/etc/nginx/conf.d
    networks:
      - myblog

networks:
  myblog:
    driver: bridge

Dockerfile

FROM php:7.3-fpm

# Arguments defined in docker-compose.yml
ARG user
ARG uid

# Install system dependencies
RUN apt-get update && apt-get install -y 
    git 
    curl 
    libpng-dev 
    libonig-dev 
    libxml2-dev 
    libzip-dev 
    zip 
    unzip

# Clear cache
RUN apt-get clean && rm -rf /var/lib/apt/lists/*

# Install PHP extensions
RUN docker-php-ext-install pdo_mysql mbstring exif pcntl bcmath gd
RUN docker-php-ext-install zip
RUN docker-php-ext-enable zip

# Get latest Composer
COPY --from=composer:latest /usr/bin/composer /usr/bin/composer

# Create system user to run Composer and Artisan Commands
RUN useradd -G www-data,root -u $uid -d /home/$user $user
RUN mkdir -p /home/$user/.composer && 
    chown -R $user:$user /home/$user

# Set working directory
WORKDIR /var/www

USER $user

Thanks in advance