add initial setup scripts used for by-02 host (vpnwg.ulakar.com)

hosts/lab-by-02/setup_docker.sh

@@ -0,0 +1,8 @@
+echo "== Docker: install from get.docker.com =="
+curl -fsSL https://get.docker.com | sh
+
+echo "== Docker: add $NEW_USER into docker group =="
+usermod -aG docker "$NEW_USER"
+systemctl enable --now docker
+
+echo "== Finished docker installation =="