The EDOC website provides many resources for thesis writing, including a Microsoft Word template for your thesis.
In addition to the word template, PolyDoc provides an unofficial LaTeX Thesis Template which may be of use. You are of course free to modify this template how you see fit. We encourage you to put up your modified template on the platform so that other EPFL PhD students can access it.
Please note that there is no official or mandatory template to be used. Templates are provided to help writing your thesis. Just remember to comply with the requirements of the Print center (Repro).