admin-insights-pages: dashboard customers+revenue (orders.amount), users->tags relation, pause customer (gates alerts), About/What-is-this/Contact pages

frontend/main.go

@@ -65,6 +65,9 @@ func main() {
 	mux := http.NewServeMux()
 	mux.Handle("GET /static/", http.StripPrefix("/static/", http.FileServer(http.Dir("static"))))
 	mux.HandleFunc("GET /{$}", app.Home)
+	mux.HandleFunc("GET /about", app.About)
+	mux.HandleFunc("GET /what-is-this", app.WhatIsThis)
+	mux.HandleFunc("GET /contact", app.Contact)
 	mux.HandleFunc("/{path...}", http.NotFound)
 	mux.HandleFunc("GET /t/{tag_code}", app.PublicTag)
 	mux.HandleFunc("GET /s/{code}", app.ServeShort)