Docker service configuration to use overlay filesystem

docker.service

#/lib/systemd/system/docker.service
[Unit]                                                                                                                                  
  0 Description=Docker Application Container Engine                                                                                            
  1 Documentation=https://docs.docker.com                                                                                                   
  2 After=network.target docker.socket                                                                                                      
  3 Requires=docker.socket                                                                                                                  
  4                                                                                                                                         
  5 [Service]                                                                                                                               
  6 Type=notify                                                                                                                             
  7 ExecStart=/usr/bin/docker daemon -H fd:// -s overlay                                                                                    
  8 MountFlags=slave                                                                                                                        
  9 LimitNOFILE=1048576                                                                                                                     
 10 LimitNPROC=1048576                                                                                                                      
 11 LimitCORE=infinity                                                                                                                      
 12                                                                                                                                         
 13 [Install]                                                                                                                               
 14 WantedBy=multi-user.target