The documentation for textures in Jupyter VPython and GlowScript VPython explains how to reference a texture that is available on a web site. Missing from that documentation is how to reference a texture on your own computer when using Jupyter VPython.
Look at the Python directory Lib/site-packages/vpython/vpython_data. There you will find the standard textures that are installed with VPython.
Place a copy of your texture in this folder. Suppose its file name is T.jpg.
In your VPython program, the following statement will display a box with your texture on it:
box(texture='/nbextensions/vpython_data/T.jpg')