1. Navigate to /lib/systemd/system in your terminal and open docker.service file
   vi /lib/systemd/system/docker.service
2. Find the line which starts with ExecStart and adds -H=tcp://0.0.0.0:2375 to make it look like
   ExecStart=/usr/bin/dockerd -H=fd:// -H=tcp://0.0.0.0:2375
3. Save the Modified File
4. Reload the docker daemon
   systemctl daemon-reload
5. Restart the container
   sudo service docker restart

source: https://medium.com/@ssmak/how-to-enable-docker-remote-api-on-docker-host-7b73bd3278c6