Progressive Web App + icon

app.py

@@ -200,5 +200,15 @@ def refresh():
     update_all_data()
     return redirect(url_for('index'))
 
+from flask import send_from_directory
+
+@app.route('/manifest.json')
+def serve_manifest():
+    return send_from_directory('static', 'manifest.json')
+
+@app.route('/static/sw.js')
+def serve_sw():
+    return send_from_directory('static', 'sw.js')
+
 if __name__ == '__main__':
     app.run(host='0.0.0.0', port=5000)