New STAC catalog endpoint to test catalog with full https paths rather than relative paths

@ewojtylko1, We can use the STAC catalog endpoint with typical stac clients like pystac because the links use relative paths. I think we need to use absolute paths, so I wrote a script to add the base url path, for the internal development endpoint "https://nhgf.dev-wma.chs.usgs.gov/api/gdp/pygeoapi/stac/stac-collection to all the links in the catalog. NOTE: @asnyder said you were removing nhgf from the base url so I did the same.

I'm wondering if we can build the internal development endpoint so I can test some stac clients against this version. Let me know if you have any questions. Also it's been a while since I've added to this repo, so if I'm off base here please let me know :).