If you are going to merger more than on file using HTML format then this tool is for you
If you have any questions please add in the issues sections.
If you don't know how to install it or use it or how to use Github, do let me know since most of these topics have been covered.
اذا اردت ان تتحدث معي بالعربي للشرح، تفضل بمراسلتي على تليجرام medohamdani