docs: improve Docker notice with setup steps and example command

snippets/install/docker-notice.mdx

@@ -1,3 +1,24 @@
 <Note>
-**Docker:** ComfyUI does not provide an official Docker image. If you want to run ComfyUI in a container, search [Docker Hub](https://hub.docker.com) for community-maintained images. Note that **none of these are official ComfyUI images**, and they are not supported by the ComfyUI team. Use them at your own risk.
+**Docker:** ComfyUI does not provide an official Docker image. If you want to run ComfyUI in a container, you can use community-maintained images from [Docker Hub](https://hub.docker.com/search?q=comfyui). Search for terms like `comfyui` or `comfy-ui` to find available images.
+
+Common setup steps when using a community image:
+1. Map port `8188` to access the web interface
+2. Ensure ComfyUI listens on `0.0.0.0` inside the container so that port mapping works from the host (most community images handle this by default)
+3. Mount a volume for your models directory
+4. Mount a volume for your output directory
+
+Example:
+```bash
+docker run -d \
+  --name comfyui \
+  --gpus all \
+  -p 8188:8188 \
+  -v /path/to/models:/ComfyUI/models \
+  -v /path/to/output:/ComfyUI/output \
+  <community-image-name>
+```
+
+GPU users need `--gpus all` (requires the [NVIDIA Container Toolkit](https://docs.nvidia.com/datacenter/cloud-native/container-toolkit/latest/install-guide.html)). Note that internal container paths like `/ComfyUI/models` may differ depending on the image. Refer to your chosen image's documentation for the exact paths.
+
+Note that **none of these images are official ComfyUI images**, and they are not supported by the ComfyUI team. Use them at your own risk.
 </Note>