added first draft of upload interface

app/frontend.py

@@ -0,0 +1,19 @@
+# app/frontend.py (new file or inline in main.py)
+from fastapi import APIRouter
+from fastapi.responses import FileResponse
+from fastapi.staticfiles import StaticFiles
+import os
+
+router = APIRouter()
+
+# 1) Serve the folder that contains index.html, etc.
+#    e.g. "frontend" is relative to your project root
+frontend_folder = os.path.join(os.path.dirname(__file__), "..", "frontend")
+
+# If you just want to serve the entire folder as static:
+router.mount("/static", StaticFiles(directory=frontend_folder), name="static")
+
+# 2) For the root route ("/"), return the index.html
+@router.get("/ui", response_class=FileResponse)
+def serve_ui():
+    return os.path.join(frontend_folder, "index.html")