Add unbuffered logging to diagnose startup

Dockerfile

@@ -13,5 +13,6 @@ COPY . .
 EXPOSE 7860
 
 ENV PORT=7860
+ENV PYTHONUNBUFFERED=1
 
 CMD ["python", "app.py"]

app.py

@@ -534,6 +534,7 @@ with gr.Blocks(title="School Name Resolver") as app:
 # ─── Launch ───────────────────────────────────────────────────────────────────
 if __name__ == "__main__":
     port = int(os.getenv("PORT", 7860))
+    print(f"Starting Gradio app on port {port}...", flush=True)
     app.launch(
         server_name="0.0.0.0",
         server_port=port,