Feliz.ViewEngine in F# aspnetcore MVC and NET5

FelizViewEngineMvc.fs

//useful links for F# FE stuff
//https://github.com/dbrattli/Feliz.ViewEngine
//https://dzoukr.github.io/Feliz.Bulma/
//https://github.com/zanaptak/TypedCssClasses
//https://www.w3schools.com/css/css_howto.asp

open Microsoft.AspNetCore.Mvc
open Feliz.ViewEngine
open Zanaptak.TypedCssClasses
open Microsoft.AspNetCore.Hosting

//all this stuff is not needed for in-memory view
//[<CLIMutable>]
//type ViewModel = { Name: string }
//Views/[ControllerName]/[ViewName].cshtml
module Constants =
    [<Literal>]
    let bootstrapCdn = "https://cdn.jsdelivr.net/npm/bootstrap@5.0.0-beta2/dist/css/bootstrap.min.css"

// A "Bootstrap" type pointing at a remote Bootstrap CSS file.
type Bootstrap = CssClasses<Constants.bootstrapCdn, Naming.PascalCase>

[<Route("")>]
type ViewController() =
    inherit Controller() 

    [<Route("")>]
    [<HttpGet>]
    member this.Index() =

        //vs cshtml files... not neeed anymore
        //this.View({ Name = "hello"})
        
        // NO I/O and strongly typed html !!! 
        // it's functions/expressions so we can refactor HTML as we like!

        let head = 
            Html.head [
                prop.children [ 
                    Html.link [
                        prop.rel "stylesheet"
                        prop.href Constants.bootstrapCdn
                    ]
                ]      
            ]

        let header = 
            Html.div [
                prop.className Bootstrap.Container
                prop.children [ 
                    Html.h1 [
                        prop.className [ Bootstrap.ContainerLg ; Bootstrap.H1 ]
                        prop.text "Hello Feliz.ViewEngine from ASPNETCORE"
                    ]
                ]
            ]

        let body =
            Html.body [
                prop.children [
                    header
                ]
            ]

        let html =
            Html.html [
                prop.children [ 
                    head
                    body
                ]
            ]
            |> Render.htmlView

        this.Content(html, "text/html")