It looks like only some of your images are showing up. Remember that relative filepaths are case sensitive! Your images folder is "images", all lowercase, not "Images", so every filepath that has "Images" in it doesn't actually lead to the proper image. So for example, this should be like this:
<img src="./resources/images/information-orientation-mobile.jpg" alt="topographical view of people on a sidewalk">
https://github.com/jeano0o/Colmar/blob/820f3445f7739bf5e561e4c68de122efeb4bd247/Colmar/index.html#L121
It looks like only some of your images are showing up. Remember that relative filepaths are case sensitive! Your images folder is "images", all lowercase, not "Images", so every filepath that has "Images" in it doesn't actually lead to the proper image. So for example, this should be like this:
<img src="./resources/images/information-orientation-mobile.jpg" alt="topographical view of people on a sidewalk">Check out what I'm seeing here: https://htmlpreview.github.io/?https://github.com/jeano0o/Colmar/blob/master/Colmar/index.html