[Unit]
Description=CTF Service covfefe
Requires=docker.service
After=docker.service

[Service]
ExecStartPre=-/usr/bin/docker kill covfefe  
ExecStartPre=-/usr/bin/docker rm covfefe    
ExecStart=/usr/bin/docker run  --name covfefe -p 8889:8889 covfefe
ExecStop=/usr/bin/docker kill covfefe

[Install]
WantedBy=multi-user.target