Add NO_PROXY to dind service for internal registry access

The dind daemon inherits proxy settings from the runner environment
which routes requests through squid. This breaks TLS/auth to
docker.internal.networkradius.com. Bypass the proxy for internal hosts.

Author: arr2036

.github/workflows/ci-multi-server-tests.yml

@@ -163,6 +163,8 @@ jobs:
         options: --privileged
         env:
           DOCKER_TLS_CERTDIR: ""
+          #  Bypass the squid proxy for internal registry access.
+          NO_PROXY: "*.networkradius.com,127.0.0.1"
         #  Mount the host's internal CA so dind trusts
         #  docker.internal.networkradius.com for image pulls.
         volumes: