Updating moc routes in valis

[havok2063]

This PR closes #27. It updates the moc valis endpoints, and adds a new endpoint for listing the available MOCs, Multi-Ordered Coverage maps. These are efficient sky footprint created from fits images or catalogs of sources. These are created with either MocPy or Hipsgen-Cat. MocPy only creates MOCs whereas hipsgen-cat creates both MOCs and HIPS catalogs.

SDSS MOCs live at $SDSS_HIPS on the SAS, that points to sas/sdsswork/sandbox/hips/, organized by {release}/{survey}. I've created MOCs and HIPS catalogs for the following surveys:

• IPL3 BHM
• DR17 manga
• DR17 mastar
• DR17 apogee
• DR17 eboss

All mocs were created with max_norder=6. The hips directory has been volume-mounted into the valis podman docker, and added into the valis config.. There is already an sdss_moc path in tree

With this in place we should be able to create new mocs, or update them, without further code mods.