Revise README for ComfyUI WebUI Generator Node

Updated README to improve clarity and formatting.

README.md

@@ -1,2 +1,25 @@
-# ComfyUI-WebUI-Generator-Node
-ComfyUI custom node that generates shareable HTML UIs from ComfyUI API workflow JSON.
+# ComfyUI WebUI Generator Node
+
+A ComfyUI custom node that generates a shareable HTML UI from a **ComfyUI API workflow JSON**.
+
+## Install
+Clone into:
+`ComfyUI/custom_nodes/ComfyUI-WebUI-Generator-Node`
+
+Restart ComfyUI.
+
+## Node
+**Workflow → HTML (Generator)**
+
+Input:
+- `api_workflow_json_or_path`: paste API workflow JSON OR give a path to a `.json`
+- `output_name`: used to name the generated file
+- `open_in_browser`: auto-open the generated URL (best effort)
+- `comfy_base_url` (optional): if your ComfyUI isn't on localhost
+
+Output:
+- `html_url`: served by ComfyUI under `/extensions/.../generated/...`
+- `html_file_path`: local path
+
+## IMPORTANT: Use API workflow JSON
+In ComfyUI: export the workflow as **API** workflow JSON (not the normal workflow JSON).