Plot Time Series and Forecast in Plotly

Dear all,
I am starting with Plotly and was wondering how to get a plot where we plot both actual data and forecast data which start at a differentg timestamp.
Actual data : from 01-2015 to 01-2018
Prediction: from 08-2017 to 01-2017.

Regards.

https://plot.ly/javascript/time-series/ is a good place to start.