How to add verification with .html verification file for google search console to blog or repository

Hello! I try to register my blog on gitlab pages to google via the google search console. The search console tells me to place a verification .html file in the root folder of my page. However, because the blog is created via gitlab’s CI/CD pipeline I do not know how to access my root folder. The alternative to register the domain of my repository (instead of that of the blog) also does not work, because google is not able to find the verification file although I upload it to my repository. Anybody has a suggestion for a solution? I.e. how to make google search console find my verification file…