Docker: I can't map ports other than 80 to my WordPress container

After a bit of research I found out that the WordPress container sets it's ports once since it needs to save the URLs(localhost:7006) in the db because I am persisting the db data.

I ran the docker-compose up once with the default port 80:80 configuration which caused the localhost:80 or localhost to be saved in the db. So when I changed the ports again and ran docker-compose up, I actually messed up the URLs that are stored in the linked mysql db container with my WordPress container.

I ran docker-compose down --volumes (this causes the persisted data destruction)and then changed the ports of my WordPress container in docker-compse.yml. Running the following command again created my WordPress container live on port 7006 (localhost:7006).docker-compose up

wordpress:depends_on:  - dbimage: wordpress:4.7.1restart: alwaysvolumes:  - ./wp-content:/var/www/html/wp-content environment:  WORDPRESS_DB_HOST: db:3306  WORDPRESS_DB_PASSWORD: p4ssw0rd!ports:  - 7006:80 # Expose http and https  - 8443:443networks:  - wp_nwk

IMPORTANT: I am just playing with docker, so I don't want to save my volumes data. Anyone wanting to keep their data must not use the docker-compose down --volumes

It's running on the desired port now

I|f you want to change the port, you need to do the follow step. I successfully changed my WordPress port

1. run WordPress with default docker-compose.yml

version: '3.3'services:   db:     image: mysql:5.7     volumes:       - db_data:/var/lib/mysql     restart: always     environment:       MYSQL_ROOT_PASSWORD: somewordpress       MYSQL_DATABASE: wordpress       MYSQL_USER: wordpress       MYSQL_PASSWORD: wordpress   wordpress:     depends_on:       - db     image: wordpress:latest     ports:       - "8000:80"     restart: always     environment:       WORDPRESS_DB_HOST: db:3306       WORDPRESS_DB_USER: wordpress       WORDPRESS_DB_PASSWORD: wordpress       WORDPRESS_DB_NAME: wordpressvolumes:    db_data: {}

2. login wordpress and change site url and home in setting to you want
3. use follow command in wordpress container

docker exec -it *wordpres_container_id* bash

4. add the follow line to wp_config.php

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

5. change docker-compose.yml ports to 80
6. restart container use follow command

docker-compose downdocker-compose up -d

you will need to change the [WordPress Address (URL) and Site Address (URL)] from wordpress admin, and then change the port in docker-compose without destroying the data in the volume.