add homework 5.2

src/vagrant/Vagrantfile

@@ -64,10 +64,19 @@ Vagrant.configure("2") do |config|
   # Enable provisioning with a shell script. Additional provisioners such as
   # Ansible, Chef, Docker, Puppet and Salt are also available. Please see the
   # documentation for more information about their specific syntax and use.
-  # config.vm.provision "shell", inline: <<-SHELL
-  #   apt-get update
-  #   apt-get install -y apache2
-  # SHELL
+  config.vm.provision "shell", inline: <<-SHELL
+    apt update
+    apt install -y ca-certificates \
+        curl \
+        gnupg \
+        lsb-release
+    curl -fsSL https://download.docker.com/linux/ubuntu/gpg | gpg --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg
+    echo "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/docker-archive-keyring.gpg] https://download.docker.com/linux/ubuntu \
+        $(lsb_release -cs) stable" | tee /etc/apt/sources.list.d/docker.list > /dev/null
+    apt update
+    apt install -y docker-ce docker-ce-cli containerd.io
+    usermod -aG docker vagrant
+  SHELL
 
   # for homework 3.5
   # config.vm.provider :virtualbox do |vb|