Cannot connect to Docker Daemon

[NathanW-05]

root@1a87c3027708:/usercode# docker build -t cve-2019-5736:exec_POC ./exec_POC

ERROR: Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?

please help fix this

[DavidGuamanDavila]

Hello,

Can you check that your docker application is running as seen in the yellow box in the image below?