FSharp logger with Serilog (app insights and console sinks)

Serilog.fs

// NuGet Packages
// Serilog.Enrichers.Environment
// Serilog.Sinks.ApplicationInsights
// Serilog.Sinks.Console

open System
open Serilog
open Serilog.Events

[<RequireQualifiedAccess>]
module Log =
    
    let private getLogEventLevel environmentVariableName (defaultLogEventLevel : LogEventLevel) =
        let parsed, logEventLevel = Enum.TryParse<LogEventLevel>(Environment.GetEnvironmentVariable(environmentVariableName))
        if parsed then
            logEventLevel
        else 
            defaultLogEventLevel
    
    let private cachedConfig =
        lazy (
            let defaultLogLevel = getLogEventLevel "DEFAULT_LOG_LEVEL" LogEventLevel.Information
            let consoleLogLevel = getLogEventLevel "CONSOLE_LOG_LEVEL" LogEventLevel.Warning   
            let instrumentationKey = Environment.GetEnvironmentVariable("APPLICATION_INSIGHTS_KEY")
            let applicationName = Environment.GetEnvironmentVariable("APPLICATION_NAME")
            let environment = Environment.GetEnvironmentVariable("ENVIRONMENT")

            Log.Logger <- 
                LoggerConfiguration()
                    .MinimumLevel.Is(defaultLogLevel)
                    .Enrich.FromLogContext()
                    .Enrich.WithMachineName()
                    .Enrich.WithEnvironmentUserName()
                    .Enrich.WithProperty("ApplicationName", applicationName)
                    .Enrich.WithProperty("Environment", environment)
                    .WriteTo.ApplicationInsights(instrumentationKey, TelemetryConverter.Traces, restrictedToMinimumLevel = defaultLogLevel)
                    .WriteTo.Console(restrictedToMinimumLevel = consoleLogLevel)
                    .CreateLogger() :> ILogger
        )

    /// <summary>
    /// Configure Serilog with Application Insights and Console sinks
    /// 
    /// Expected environment variables:
    /// 
    /// APPLICATION_NAME: Application friendly name
    /// 
    /// APPLICATION_INSIGHTS_KEY: Application Insights instrumentation key
    /// 
    /// CONSOLE_LOG_LEVEL: Console sink restricted to minimum level
    /// 
    /// DEFAULT_LOG_LEVEL: Application Insights sink restricted to minimum level
    ///
    /// ENVIRONMENT: The environment the application is running on
    /// </summary>
    let configure () = cachedConfig.Force()

[<EntryPoint>]
let main argv =

    try
        try
            Log.configure ()

            let logger = Log.ForContext<MyApp>()

            logger.Verbose("verbose")
            logger.Debug("debug")
            logger.Information("info")
            logger.Warning("warn")
            logger.Error("error")
            logger.Fatal("fatal")
        with
        | ex -> 
            Console.WriteLine(ex)
            Log.Fatal(ex, ex.Message)
    finally
        Log.CloseAndFlush()

    0 // return an integer exit code