WordPress Site with Docker behind Apache reverse proxy keeps redirecting from do

Hello everyone, I’m currently in the process of setting up WordPress using Docker Compose and Apache which is running on the host as a reverse proxy (unfortunately, I can’t use nginx). Additionally, I use Cloudflare. When I attempt to access the site using the domain, I encounter an immediate redirect to “https://127.0.0.1:8585/wp-admin/install.php” instead of the desired “https://example.com/wp-admin/install.php”.

To address this, I modified the configuration by adding the following two lines:

define('WP_HOME','https://example.com');
define('WP_SITEURL','https://example.com');

This adjustment effectively resolves the problem. However, upon completing the WordPress installation process, a new issue arises where the front page consistently redirects to the local IP address 127.0.0.1 even though i have used the domain to access the site. By the way, I have PHPMyAdmin also running within the same container, and the reverse proxy is functioning flawlessly. Therefore, I suspect the issue might be related to the WordPress Docker image. Is there anyone who has a solution for this problem?

docker compose config:

version: '3'

services:
  wp:
    image: wordpress:latest # https://hub.docker.com/_/wordpress/
    ports:
      - 127.0.0.1:8585:80 # change ip if required
    volumes:
      - ./config/php.conf.ini:/usr/local/etc/php/conf.d/conf.ini
      - ./wp-app:/var/www/html # Full wordpress project
      #- ./plugin-name/trunk/:/var/www/html/wp-content/plugins/plugin-name # Plugin development
      #- ./theme-name/trunk/:/var/www/html/wp-content/themes/theme-name # Theme development
    environment:
      WORDPRESS_DB_HOST: db
      WORDPRESS_DB_NAME: "${DB_NAME}"
      WORDPRESS_DB_USER: "${DB_USER}"
      WORDPRESS_DB_PASSWORD: "${DB_PASSWORD}"
      WORDPRESS_CONFIG_EXTRA: |
               define('WP_HOME','https://example.com');
               define('WP_SITEURL','https://example.com');
    depends_on:
      - db
    links:
      - db

  wpcli:
    image: wordpress:cli
    volumes:
      - ./config/php.conf.ini:/usr/local/etc/php/conf.d/conf.ini
      - ./wp-app:/var/www/html
    environment:
      WORDPRESS_DB_HOST: db
      WORDPRESS_DB_NAME: "${DB_NAME}"
      WORDPRESS_DB_USER: "${DB_USER}"
      WORDPRESS_DB_PASSWORD: "${DB_PASSWORD}"
    depends_on:
      - db
      - wp
##################################################################################
##################################################################################
##################################################################################
  pma:
    image: phpmyadmin/phpmyadmin
    environment:
      # https://docs.phpmyadmin.net/en/latest/setup.html#docker-environment-variables
      PMA_HOST: db
      PMA_PORT: 3306
      MYSQL_ROOT_PASSWORD: "${DB_ROOT_PASSWORD}"
      UPLOAD_LIMIT: 100M
    ports:
      - 127.0.0.1:8686:80
    links:
      - db:db
##################################################################################
##################################################################################
##################################################################################
  db:
    image: mariadb:latest # https://hub.docker.com/_/mysql/ - or mariadb https://hub.docker.com/_/mariadb
    ports:
      - 127.0.0.1:5460:3306 # change ip if required
    command: [
        '--default_authentication_plugin=mysql_native_password',
        '--character-set-server=utf8mb4',
        '--collation-server=utf8mb4_unicode_ci'
    ]
    volumes:
      - ./wp-data:/docker-entrypoint-initdb.d
      - db_data:/var/lib/mysql
    environment:
      MYSQL_ROOT_PASSWORD: "${DB_ROOT_PASSWORD}"

volumes:
  db_data:

apache config:

<VirtualHost *:443>
    ServerName example.com
    ServerAlias www.example.com
    RemoteIPHeader CF-Connecting-IP

    SSLEngine On
    SSLCertificateFile /etc/apache2/ssl/example.com/example.com.pem
    SSLCertificateKeyFile /etc/apache2/ssl/example.com/example.com.key

    ProxyPass / https://127.0.0.1:8585/
    ProxyPassReverse / https://127.0.0.1:8585/

    ErrorLog ${APACHE_LOG_DIR}/error.log
    CustomLog ${APACHE_LOG_DIR}/access.log combined
</VirtualHost>