Add default value to AllowCorsFrom setting

model/config.go

@@ -39,7 +39,7 @@ type ServiceSettings struct {
 	EnableDeveloper                   *bool
 	EnableSecurityFixAlert            *bool
 	EnableInsecureOutgoingConnections *bool
-	AllowCorsFrom                     string
+	AllowCorsFrom                     *string
 	SessionLengthWebInDays            *int
 	SessionLengthMobileInDays         *int
 	SessionLengthSSOInDays            *int
@@ -378,6 +378,11 @@ func (o *Config) SetDefaults() {
 		o.ServiceSettings.WebsocketSecurePort = new(int)
 		*o.ServiceSettings.WebsocketSecurePort = 443
 	}
+
+	if o.ServiceSettings.AllowCorsFrom == nil {
+		o.ServiceSettings.AllowCorsFrom = new(string)
+		*o.ServiceSettings.AllowCorsFrom = ""
+	}
 }
 
 func (o *Config) IsValid() *AppError {