How to change the document root in PHP:7.1-apache from docker-compose.yml

I found a solution for this issue. basically, it worked when I created a Dockerfile with build commands. So the following structure fixed the issue:

docker-compose.yml

version: '3'services:    web:        build: .        ports:            - 80:80        volumes:            - ./src:/var/www/html

Dockerfile

FROM php:7.1-apacheENV APACHE_DOCUMENT_ROOT=/var/www/html/publicRUN sed -ri -e 's!/var/www/html!${APACHE_DOCUMENT_ROOT}!g' /etc/apache2/sites-available/*.confRUN sed -ri -e 's!/var/www/!${APACHE_DOCUMENT_ROOT}!g' /etc/apache2/apache2.conf /etc/apache2/conf-available/*.conf

Just remember to run docker-compose build before running the image (if anybody else have the same problem).

For testing temporary solutions, you can manually change the apache .conf file.When your container is running, enter the bash:

docker exec -it your_container_name bash

Edit the content of the .conf file:

vim /etc/apache2/sites-available/000-default.conf

(if vim is not found, run apt-get update and apt-get install vim)

Finally reload apache:

/etc/init.d/apache2 reload

You are running the sed command in "Environment section". Instead, you can use the "command" section to execute your sed command. These commands will run after entrypoint of Docker. So, your updated docker-compose.yaml will look something like as follow:

 version: '3'services:    laravel:        image: php:7.1-apache        ports:            - 8080:80        command:            - export APACHE_DOCUMENT_ROOT=/path/to/new/root            - sed -ri -e 's!/var/www/html!${APACHE_DOCUMENT_ROOT}!g' /etc/apache2/sites-available/*.conf            - sed -ri -e 's!/var/www/!${APACHE_DOCUMENT_ROOT}!g' /etc/apache2/apache2.conf /etc/apache2/conf-available/*.conf        volumes:            - ./src/:/var/www/html/

Please update your docker-compose.yaml file and then let me know if it solves your problem