Configure CORS policy to be accessed from the different host

[scalalang2]

Background

API server is inherently designed as standalone server
It wouldn't contains any frontend sources

So, if frontend website is needed to access to our server
We must allow different host to access to the api server

Details

• Add allowed_host to the config.toml
  • "*" means any website, if specific host is needed, then wite hostname like http://localhost:3000/
• Write response with header Access-Control-Allow-Origin for each api handlers.

[scalalang2]

resolved