Manual enable browser cache (1 hour expiry) for static assets

internal/webserver/server.go

@@ -103,6 +103,8 @@ func (app *Application) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 	parts := strings.Split(r.URL.Path, "/")[1:]
 	switch parts[0] {
 	case "static":
+		// Static files can be stored in browser cache
+		w.Header().Set("Cache-Control", "public, max-age=3600")
 		if use_embedded == "true" {
 			// Serve directly from the embedded files
 			http.FileServer(http.FS(embedded_files)).ServeHTTP(w, r)