fix: check if the discovered docker socket responds

internal/core/docker_host.go

@@ -116,6 +116,22 @@ func extractDockerHost(ctx context.Context) string {
 			continue
 		}
 
+		// check if the docker host responds to an Info request
+		// we are going to use the default Docker client to check if the host is reachable
+		// which will avoid recursive calls to this function
+		cli, err := client.NewClientWithOpts(client.WithHost(dockerHost))
+		if err != nil {
+			outerErr = fmt.Errorf("%w: %w", outerErr, err)
+			continue
+		}
+		defer cli.Close()
+
+		_, err = cli.Info(ctx)
+		if err != nil {
+			outerErr = fmt.Errorf("%w: %w", outerErr, err)
+			continue
+		}
+
 		return dockerHost
 	}