feat: Docker installation.

docker/README.md

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+# Install Docker
+
+## How to
+
+```bash
+REMOTE_USER=user
+REMOTE_HOST=host.example.com
+ssh {REMOTE_USER}@{REMOTE_HOST} 'sudo /bin/bash -s' < install.sh 
+```

docker/install.sh

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+#/bin/bash
+
+## Install dependencies
+
+apt update
+apt install -y ca-certificates curl gnupg lsb-release
+
+## Add GPG Key
+
+mkdir -p /etc/apt/keyrings
+curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /etc/apt/keyrings/docker.gpg
+
+## Add repository
+
+echo \
+ "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/ubuntu \
+ $(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null
+
+## Install docker
+
+apt update
+apt install -y docker-ce docker-ce-cli containerd.io docker-compose-plugin