Automated html product template creator

I would like to develop a simple app that allows to create html files based on a selected product template containing fixed sections such as Shipping & Payments. It should also contain variable fields such as title, body, price, photos, alternative text for photos, meta fields. These fields should be updated via a csv file, the csv would also state the folder location of the photos to be used and inserted into the html. These will be inserted according to the ranking of their filename which would contain a number at the end e.g abcd1, abcd2, abcd3. The app should also be able to customize the font/colour of the title & body text as well as overall layout of the html file to be generated.