lemmy/docs/src/contributing_docker_development.md

Docker Development

Running

sudo apt install git docker-compose
git clone https://github.com/LemmyNet/lemmy
cd lemmy/docker/dev
sudo docker-compose up --no-deps --build

and go to http://localhost:8536.

To speed up the Docker compile, add the following to /etc/docker/daemon.json and restart Docker.

{
  "features": {
    "buildkit": true
  }
}

If the build is still too slow, you will have to use a local build instead.