Confirmation page and minor improvements to homepage and form messages

Basic redirect with flash messages for success and error messages

src/routes/subscriptions_confirm.rs

@@ -1,4 +1,5 @@
 use crate::startup::AppState;
+use askama::Template;
 use axum::{
     extract::{Query, State},
     http::StatusCode,
@@ -8,6 +9,10 @@ use serde::Deserialize;
 use sqlx::PgPool;
 use uuid::Uuid;
 
+#[derive(Template)]
+#[template(path = "../templates/confirm.html")]
+struct ConfirmTemplate;
+
 #[tracing::instrument(name = "Confirming new subscriber", skip(params))]
 pub async fn confirm(
     State(AppState {
@@ -27,7 +32,7 @@ pub async fn confirm(
         {
             StatusCode::INTERNAL_SERVER_ERROR.into_response()
         } else {
-            Html(include_str!("register/confirm.html")).into_response()
+            Html(ConfirmTemplate.render().unwrap()).into_response()
         }
     } else {
         StatusCode::UNAUTHORIZED.into_response()