feat(uc/caddy): expose 443/udp port for HTTP3 (#204)

* feat(caddy): expose 443/udp port for HTTP3

* expose udp port 443 for caddy to support new HTTP3

* chore: Add comment for HTTP/3 (QUIC) port configuration

Added a comment to clarify the purpose of the UDP port configuration.

---------

Co-authored-by: Anton Ovchinnikov <anton@tonyo.info>

pkg/client/caddy.go

@@ -71,6 +71,13 @@ func (cli *Client) NewCaddyDeployment(image, config string, placement api.Placem
 				Protocol:      api.ProtocolTCP,
 				Mode:          api.PortModeHost,
 			},
+			// Needed for HTTP/3 (QUIC)
+			{
+				PublishedPort: 443,
+				ContainerPort: 443,
+				Protocol:      api.ProtocolUDP,
+				Mode:          api.PortModeHost,
+			},
 		},
 		Volumes: []api.VolumeSpec{
 			{