Configure a ComfyUI backend that can generate images for dsh-comfyui on Alibaba Cloud ECS

dsh-comfyui itself does not include compute; you need to deploy ComfyUI to Alibaba Cloud ECS, keep DSH and the plugin local, and the default connection address is http://127.0.0.1:8188. Choose the configuration based on three topologies: same machine, VPC intranet, and EIP public network; fill baseUrl with the default value, the private IP, or the EIP respectively. ComfyUI by default only listens on the loopback address, so you need to start it with --listen; the security group should only allow port 8188 for a fixed egress IP.