app URL update

[josh-chamberlain]

https://source-collector.pdap.io/api
↓
https://source-manager.pdap.io/api (or send it and go https://url-manager.pdap.io/api? that's accurate)

Now may be time to do this as well:

https://data-sources-v2.pdap.io/api
↓
https://data-sources.pdap.io/api

This will require a fair amount of

to make sure the things consuming the APIs have the right base URLs and the docs have the appropriate links to API docs

[maxachis]

I did this! @josh-chamberlain Can you confirm that this all looks good, and we'll call it complete?