Try fixing POST

backend/app.py

@@ -1,6 +1,7 @@
 from fastapi import FastAPI, HTTPException
 from fastapi.middleware.cors import CORSMiddleware
 from fastapi.staticfiles import StaticFiles
+from fastapi.responses import FileResponse
 from transformers import GPT2Tokenizer, GPT2Model, pipeline
 import torch as t
 import logging
@@ -21,6 +22,7 @@ app.add_middleware(
 # Mount static files (frontend) so that visiting "/" serves index.html
 # Note: The directory path "../frontend" works because when running in Docker,
 # our working directory is set to /app, and the frontend folder is at /app/frontend.
+app.mount("/static", StaticFiles(directory="frontend", html=True), name="static")
 
 # Load tokenizer and GPT2 model
 tokenizer = GPT2Tokenizer.from_pretrained('gpt2')
@@ -83,4 +85,8 @@ def generate(text: str):
     output = pipe(text)
 
     # Return the generated text in a JSON response
-    return {"output": output[0]["generated_text"]}
+    return {"output": output[0]["generated_text"]}
+
+@app.get("/")
+async def read_index():
+    return FileResponse("frontend/index.html")