forum/docs/existing-project.md

Installing on an Existing Project

It's also to use Symfony Docker with existing projects!

First, download this skeleton. If you clone the Git repository, be sure to remove the .git repository to prevent conflicts with the .git directory already in your existing project.

Then, copy the Docker-related files from the skeleton to your existing project:

cp -Rp symfony-docker/. my-existing-project/

Enable the Docker support of Symfony Flex:

composer config --json extra.symfony.docker 'true'

Re-execute the recipes to update the Docker-relatd files according to the packags you use

rm symfony.lock
composer symfony:sync-recipes --force --verbose

Double-check the changes, revert the changes that you don't want to keep:

git diff
...

Build the Docker images:

docker-compose build --no-cache --pull

Start the projects!

docker-compose up -d

Browse https://localhost, your Docker configuration is ready!