Update app.py

app.py

@@ -9,6 +9,18 @@ app = Flask(__name__)
 # Define the path to static files
 static_dir = os.path.join(os.path.dirname(os.path.abspath(__file__)))
 
+@app.route('/css')
+def css():
+    return send_from_directory(os.path.join(static_dir, 'css')
+
+@app.route('/js')
+def js():
+    return send_from_directory(os.path.join(static_dir, 'js')
+
+@app.route('/img')
+def img():
+    return send_from_directory(os.path.join(static_dir, 'img')                               
+
 @app.route('/')
 def index():
     return send_from_directory(static_dir, 'index.html')