rename frontend to web and update contributing guide (#2509)

* rename frontend to web and update contributing guide

* rename this time

* fix build

* restructure rust code

* update documentation

* update descriptions

* Update CONTRIBUTING.md

Co-authored-by: J H <2364004+Blu-J@users.noreply.github.com>

---------

Co-authored-by: Aiden McClelland <me@drbonez.dev>
Co-authored-by: Aiden McClelland <3732071+dr-bonez@users.noreply.github.com>
Co-authored-by: J H <2364004+Blu-J@users.noreply.github.com>

core/startos/src/net/web_server.rs

@@ -0,0 +1,61 @@
+use std::convert::Infallible;
+use std::net::SocketAddr;
+
+use futures::future::ready;
+use futures::FutureExt;
+use helpers::NonDetachingJoinHandle;
+use hyper::service::{make_service_fn, service_fn};
+use hyper::Server;
+use tokio::sync::oneshot;
+
+use crate::context::{DiagnosticContext, InstallContext, RpcContext, SetupContext};
+use crate::net::static_server::{
+    diag_ui_file_router, install_ui_file_router, main_ui_server_router, setup_ui_file_router,
+};
+use crate::net::HttpHandler;
+use crate::Error;
+
+pub struct WebServer {
+    shutdown: oneshot::Sender<()>,
+    thread: NonDetachingJoinHandle<()>,
+}
+impl WebServer {
+    pub fn new(bind: SocketAddr, router: HttpHandler) -> Self {
+        let (shutdown, shutdown_recv) = oneshot::channel();
+        let thread = NonDetachingJoinHandle::from(tokio::spawn(async move {
+            let server = Server::bind(&bind)
+                .http1_preserve_header_case(true)
+                .http1_title_case_headers(true)
+                .serve(make_service_fn(move |_| {
+                    let router = router.clone();
+                    ready(Ok::<_, Infallible>(service_fn(move |req| router(req))))
+                }))
+                .with_graceful_shutdown(shutdown_recv.map(|_| ()));
+            if let Err(e) = server.await {
+                tracing::error!("Spawning hyper server error: {}", e);
+            }
+        }));
+        Self { shutdown, thread }
+    }
+
+    pub async fn shutdown(self) {
+        self.shutdown.send(()).unwrap_or_default();
+        self.thread.await.unwrap()
+    }
+
+    pub async fn main(bind: SocketAddr, ctx: RpcContext) -> Result<Self, Error> {
+        Ok(Self::new(bind, main_ui_server_router(ctx).await?))
+    }
+
+    pub async fn setup(bind: SocketAddr, ctx: SetupContext) -> Result<Self, Error> {
+        Ok(Self::new(bind, setup_ui_file_router(ctx).await?))
+    }
+
+    pub async fn diagnostic(bind: SocketAddr, ctx: DiagnosticContext) -> Result<Self, Error> {
+        Ok(Self::new(bind, diag_ui_file_router(ctx).await?))
+    }
+
+    pub async fn install(bind: SocketAddr, ctx: InstallContext) -> Result<Self, Error> {
+        Ok(Self::new(bind, install_ui_file_router(ctx).await?))
+    }
+}