fix(spaces): use uvicorn directly in Dockerfile for HuggingFace Spaces

Dockerfile

@@ -41,7 +41,7 @@ RUN mkdir -p monitoring/predictions
 # Expose default port (Spaces uses 7860, but PORT env var is set dynamically)
 EXPOSE 7860
 
-# Spaces will run: python app.py
-# The app.py file handles PORT env var automatically
-CMD ["python", "app.py"]
+# Run uvicorn directly, referencing app from app.py
+# HuggingFace Spaces sets PORT env var automatically (use shell form to expand env var)
+CMD ["sh", "-c", "uvicorn app:app --host 0.0.0.0 --port ${PORT:-7860}"]
 

app.py

@@ -1,5 +1,5 @@
 """
-HuggingFace Spaces entry point for Russian News Classification API.
+HuggingFace Spaces entry point for News Classification API.
 
 This file is required by HuggingFace Spaces. It imports and exposes the FastAPI app
 from api/main.py. Spaces will automatically run this with uvicorn.
@@ -15,13 +15,18 @@ sys.path.insert(0, str(app_dir))
 # Import the FastAPI app from api.main
 from api.main import app
 
-# HuggingFace Spaces automatically handles PORT, but we can set it here as fallback
-# Spaces expects the app to be accessible via the 'app' variable
+# HuggingFace Spaces expects the app to be accessible via the 'app' variable
+# For Docker Spaces, we need to run uvicorn directly when executed
 __all__ = ["app"]
 
 if __name__ == "__main__":
-    # For local testing
     import uvicorn
-    port = int(os.environ.get("PORT", 8000))
-    uvicorn.run(app, host="0.0.0.0", port=port)
+    # HuggingFace Spaces sets PORT env var (typically 7860)
+    port = int(os.environ.get("PORT", 7860))
+    uvicorn.run(
+        "app:app",  # Use string reference so it works with app variable
+        host="0.0.0.0",
+        port=port,
+        log_level="info"
+    )