Docker does not pull container through cli proxy

Hello, there is no internet on my server. I need to update some docker images. I want to run a proxy with docker systemd. However, I could not get it to work with docker proxy. My proxy server works as http and I can do transactions without asking for ID. I can do Git or Pip manually with http://proxyserver:3218 without any problems. However, I cannot pull Docker images with proxy.

The errors are ;

What could be the cause of these errors. I think I did it correctly according to the docker proxy steps, but I couldn’t solve the problem, can you help me?

thankyou for support.