Reference
allowed_origins
The list of accepted origins. When empty, and same_origin is false, clients from any origin are allowed to connect.
This list specifies the only accepted values for the client's request Origin header. The scheme, host, and port must match. By convention, the absence of TCP port in the URL will be port 80 for an "http://" scheme, and 443 for "https://".
- Default value: n/a
 - Hot reloadable: Yes
 - Aliases: 
allowed_origin,allow_origins,allow_origin,origins,origin 
Values
| Type | Description | Choices | 
|---|---|---|
[ string ] | - | - |