I have a plotly boxplot chart with array of many values and all works well, but I want to highlight one value.

this is my code

var ebitda_margin_plotly = {
                      x: data.plotly_data.ebitda_margin,
                      type: 'box',
                      name: 'E-MARGIN',
                      marker: {
                      color: 'rgba(255, 202, 3, 0.7)',
                      outliercolor: 'rgba(219, 64, 82, 0.6)',
                      line: {
                        outliercolor: 'rgba(219, 64, 82, 1.0)',
                        outlierwidth: 2
                      }
                    },
                    boxpoints: 'suspectedoutliers'
                    };

                    var ebitda_margin_config = {
                    responsive: true,
                    modeBarButtonsToRemove: ['pan2d','select2d','lasso2d','resetScale2d'],
                    displaylogo: false,
                    autosizable: true

                    }
                     var layout_ebitda_margin = {
                      title: ('EBITDA MARGIN: ' + data.data.ebitda_margin + "%")
                    };
Plotly.newPlot('ebitda_margin_plotly', [ebitda_margin_plotly], layout_ebitda_margin,ebitda_margin_config);

how can I add line like this blue which will represent my custom value ? in thiscase 11.7% I have from backend