How do I add vertical moving hover line to my plotly chart

I am trying to achieve what is done here: https://www.quantalys.com/Fonds/120955 with javascript in python plotly. I want to add the hover vertical line and the red annotation on the x axis. I have done some searching on goolgle but I couldn't find the the answer I'm looking for. My current chart looks like this: trace1 = go.Scatter( x = df1.x, y = df1.y, name = "M&G OPTIMAL INCOME FD EUR AH ACC",