Image does not show

Following does not show image on the screen:

myImage..jpg is placed under WebContent folder.

Embedded em = new Embedded("", new External Resource("./myImage.jpg");
em.setMimeType("image/jpg");
....

verticalLayout.addComponent(em)

I tried "myImage.jpg", "/myImage.jpg" and "./myImage.jpg". None of them work. What am I doing wrong?

created VAADIN/themes/raindeer/mythemes/images/myImage.jpg and then used ThemeResource. Image now shows