The files corresponding to static global pages are under /app/public/html/, and all you need to do is edit or add new file. When you create a new file, make sure it is named page.$pageId.html where $pageId is a one word ID for your page. For example, if you want to create a new page for GFKB, you can create page.gfkb.html and this page will be accessible at https://hivelab.biochemistry.gwu.edu/gfkb
Note that all the files for static pages should have the tag <hivelabtag> in their first line.
The menu is controlled by the JSON file /app/src/components/global/config.json, and one can edit this JSON file to add/edit to the menu structure.