Build me a website - config generator

Website, preferably with any front end technology such as React Angular or .net MVC or any latest technologies. Basic functionalities should be, a user will be provided a series of clickable/drop down options and sub-options and at the end a form should be presented for the user input, and these values should be replaced in a file and output by text file. The end goal is to achieve something similar to [login to view URL] But the "select template" would be the 3rd or 4th step, following a number of options chosen by user. e.g. 1. User presented with 4 options, A - C. User chooses "A" 2. User then presented with 4 options 1-4, user chooses "1" 3. User then presented with 4 options, W-Z, user chooses "w" 4. Form should be presented to user and values replaced in template file "A-1-W" So the template could be anything from "A-1-W" or "C-4-Z" I will provide these template files identifying the variables that will need replacing.