Add caching for static web assets

settings/pkg/config/config.go

@@ -20,6 +20,7 @@ type HTTP struct {
 	Addr      string
 	Namespace string
 	Root      string
+	CacheTTL  int
 }
 
 // GRPC defines the available grpc configuration.

settings/pkg/flagset/flagset.go

@@ -136,6 +136,13 @@ func ServerWithConfig(cfg *config.Config) []cli.Flag {
 			EnvVars:     []string{"SETTINGS_HTTP_ROOT"},
 			Destination: &cfg.HTTP.Root,
 		},
+		&cli.IntFlag{
+			Name:        "http-cache-ttl",
+			Value:       604800, // 7 days
+			Usage:       "Set the static assets caching duration in seconds",
+			EnvVars:     []string{"SETTINGS_CACHE_TTL"},
+			Destination: &cfg.HTTP.CacheTTL,
+		},
 		&cli.StringFlag{
 			Name:        "grpc-addr",
 			Value:       "0.0.0.0:9191",

settings/pkg/server/http/server.go

@@ -60,6 +60,7 @@ func Server(opts ...Option) http.Service {
 			assets.Logger(options.Logger),
 			assets.Config(options.Config),
 		),
+		options.Config.HTTP.CacheTTL,
 	))
 
 	mux.Route(options.Config.HTTP.Root, func(r chi.Router) {