How to make this plotly chart responsive in index.html - I create a flask app and js function for rendering the plot, however, I cannot figure out, how to make it responsive. What is wrong with variable config - it seems not to work.

Thank you

Flask:

@app.route('/')
def index():

    locations = sorted(df['location'].unique())
    rooms = sorted(df['rooms'].unique())

    # Visualisation
    import json
    import plotly
    import plotly.express as px
    df.rooms = df.rooms.astype(str)
    fig = px.scatter(df, x="m2", y="price", trendline="ols", color="rooms", symbol='rooms',
                                marginal_x="histogram", 
                                marginal_y="rug",
                                template='plotly_dark', hover_data=['price', 'rooms', 'm2', 'location'],
                                title="Real Estate in Vienna")
    
    graphJSON = json.dumps(fig, cls=plotly.utils.PlotlyJSONEncoder)

    return render_template('index.html', locations=locations, rooms=rooms, graphJSON=graphJSON)

JavaScript:

                    <!-- Visualisation -->
                    {%block content%}
                    <div class="card mb-4 m-auto" style="width: 90%">
                        <div class="card-body">
                            <div id="chart"></div>
                        </div>
                    </div>
                    {% endblock %}

    <!-- Plotly -->
    <script src="https://cdn.plot.ly/plotly-latest.min.js"></script>
    <script type="text/javascript">
        var graphs = {{ graphJSON | safe}};
        var config = {responsive: true};
        Plotly.newPlot("chart", graphs, {}, config);
    </script>