Modify endpoint config to take contextual strings (#317)

I don't know what the scoping is for `network.EndpointSettings`.
If by chance it's global then contextual strings are needed to
stop clashes.

Also log networking information.

Author: kegsay

internal/docker/deployer.go

@@ -212,7 +212,7 @@ func deployImage(
 		Mounts:          mounts,
 	}, &network.NetworkingConfig{
 		EndpointsConfig: map[string]*network.EndpointSettings{
-			hsName: {
+			contextStr: {
 				NetworkID: networkID,
 				Aliases:   []string{hsName},
 			},
@@ -275,6 +275,9 @@ func deployImage(
 				"test pollution. Remove the VOLUME in the Dockerfile to suppress this message.", containerName, vol,
 		)
 	}
+	for nw, nwinfo := range inspect.NetworkSettings.Networks {
+		log.Printf("%s network %s: %+v", containerName, nw, nwinfo)
+	}
 
 	baseURL, fedBaseURL, err := endpoints(inspect.NetworkSettings.Ports, 8008, 8448)
 	if err != nil {