I just ran:
cd /var/discourse git pull ./launcher rebuild app
And am getting:
Your Docker installation is not working correctly See: https://meta.discourse.org/t/docker-error-on-bootstrap/13657/18?u=sam
What do I do?
First things first … scroll up.
The error will usually contain multiple lines, the last line just points you here, previous lines point at the actual issue.
Second thing … can you run a trivial container… try.
docker run -it --rm hello-world
If this is not working, your docker installation is broken.
First start by googling the error you found, remember there is a very active community at https://forums.docker.com/ that may either have had this issue or can help you out.
Maybe you are out of disk space?
Very often the problem is solved by the team
sudo systemctl restart docker.service