Docker requirements

• Docker Engine
• Docker Compose (the docker compose plugin, included with current Docker installs)

If you do not have Docker yet, install it. The quickest way on most Linux distributions is the official convenience script:

curl -fsSL https://get.docker.com | sudo sh

Or install it from your distribution's packages:

Debian / Ubuntu

sudo apt update
sudo apt install docker.io docker-compose-v2

Fedora / RHEL / Rocky / AlmaLinux

sudo dnf install docker-ce docker-ce-cli containerd.io docker-compose-plugin

For the most current, distribution-specific steps (and Docker Desktop on macOS or Windows), follow the official guide at https://docs.docker.com/engine/install/.

After installing, start Docker and, optionally, allow your user to run it without sudo:

sudo systemctl enable --now docker
sudo usermod -aG docker "$USER"   # log out and back in for this to take effect

Verify it works:

docker run --rm hello-world

Next: install Bakdrop with Docker.