[BugFix] Default API Settings

[deeleeramone]

1. Why?:

   • Default API settings was not updated for license change.

   • Setting the default 'url' for the API as http://localhost is not able to communicate with Docker and will create a mismatch between the CL launch for the server, and what is run by the OpenBB App script.

2. What?:

   • Change license to AGPLv3

   • Change the default server url to an empty string.

3. Impact (1-2 sentences or a bullet point list):

   • Docker can be run without first writing a system_settings.json file to the container.

4. Testing Done:

   • With and without Docker.
   • This can be tested by running the uvicorn CL launch with a different host or port number than what is configured by default (http://localhost:8000). Removing the default setting fixes a network error that would otherwise occur in the Swagger docs.