Fast-API-FAQ.md

@@ -26,5 +26,7 @@ Needs to be added at two points in the source code:
 stac_fastapi/core/stac_fastapi/core/core.py 
 stac_fastapi/core/stac_fastapi/core/extensions/filter.py
 ```
+## How to customize the browser to suit project theme?
 
+The variables.css under stac-browser/src/theme can be modified to add a logo, change background color so that they mach the project theme.