test: add simple test app to verify HF Spaces setup

Dockerfile

@@ -64,5 +64,5 @@ ENV HOME=/home/user \
 # Expose port
 EXPOSE 7860
 
-# Run FastAPI
-CMD ["uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "7860"]
+# Run simple test app first to verify HF Spaces setup
+CMD ["uvicorn", "test_app:app", "--host", "0.0.0.0", "--port", "7860"]

test_app.py

@@ -0,0 +1,13 @@
+"""Simple test app to verify HF Spaces setup."""
+
+from fastapi import FastAPI
+
+app = FastAPI()
+
+@app.get("/")
+def root():
+    return {"status": "working", "message": "Test app is running!"}
+
+@app.get("/health")
+def health():
+    return {"status": "healthy"}