appsettings.json

{
    "Serilog": {
        "Using": [
        ],
        "Enrich": [
            "WithThreadId"
        ],
        "MinimumLevel": {
            "Default": "Debug"
        },
        "WriteTo": [
            {
                "Name": "Console",
                "Args": {
                    "outputTemplate": "{Timestamp:dd/MM/yy HH:mm:ss,fff} [{Level:u3}] Thread:{ThreadId} {Message}{NewLine:1}"
                }
            },
            {
                "Name": "Logger",
                "Args": {
                    "configureLogger": {
                        "Filter": [
                            {
                                "Name": "ByIncludingOnly",
                                "Args": {
                                    "expression": "@Level = 'Warning'"
                                }
                            }
                        ],
                        "WriteTo": [
                            {
                                "Name": "File",
                                "Args": {
                                    "path": "./warning.log"
                                }
                            }
                        ]
                    }
                }
            },
            {
                "Name": "Logger",
                "Args": {
                    "configureLogger": {
                        "Filter": [
                            {
                                "Name": "ByIncludingOnly",
                                "Args": {
                                    "expression": "@Level = 'Error'"
                                }
                            }
                        ],
                        "WriteTo": [
                            {
                                "Name": "File",
                                "Args": {
                                    "path": "./error.log"
                                }
                            }
                        ]
                    }
                }
            }
        ]
    }
}