using docker with proxy

1. Create the drop-in directory:
   bash

   sudo mkdir -p /etc/systemd/system/docker.service.d
   

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2. Create the proxy configuration file:
   Create a file named /etc/systemd/system/docker.service.d/http-proxy.conf.
3. Add your proxy details:
   Paste the following into the file, replacing the placeholder URLs with your actual proxy address:
   ini

   [Service]
   Environment="HTTP_PROXY=http://proxy.example.com:3128"
   Environment="HTTPS_PROXY=http://example.com"
   Environment="NO_PROXY=localhost,127.0.0.1,docker-registry.example.com"
   

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4. Apply the changes:
   Reload the systemd manager configuration and restart the Docker service:
   bash

   sudo systemctl daemon-reload
   sudo systemctl restart docker
   

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5. Verify the configuration:
   Check if the environment variables are active:
   bash

   sudo systemctl show --property=Environment docker
   

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2. Configure the Docker Client (Containers & Builds) 

This configuration tells Docker to automatically inject proxy environment variables into any new container you run or any image you build. 

1. Edit the user config file:
   Open (or create) ~/.docker/config.json in your home directory.
2. Add the proxies block:
   Ensure the structure looks like this:
   json

   {
     "proxies": {
       "default": {
         "httpProxy": "http://proxy.example.com:3128",
         "httpsProxy": "http://example.com",
         "noProxy": "localhost,127.0.0.1"
       }
     }
   }
   

   Use code with caution.