Add index page and link to share more easily

cmd/web/routes.go

@@ -22,6 +22,7 @@ func (app *application) routes() http.Handler {
 	cached := alice.New(app.cacheStatic)
 	mux.Handle("GET /static/", cached.Then(http.FileServerFS(ui.Files)))
 
+	mux.HandleFunc("GET /", app.indexPage)
 	mux.HandleFunc("GET /election/create", app.createElectionPage)
 	mux.HandleFunc("GET /election/{id}", app.getElectionPage)