remove web dependencies

cmd/ingestd/web.go

@@ -47,6 +47,7 @@ func runWebServer(ctx context.Context, d *db.DB, site providers.Site, model, add
 	}
 
 	mux := http.NewServeMux()
+	staticFiles := http.FileServer(http.FS(sub))
 	mux.HandleFunc("/api/dashboard", ws.handleDashboard)
 	mux.HandleFunc("/api/health", func(w http.ResponseWriter, r *http.Request) {
 		w.Header().Set("Content-Type", "application/json")
@@ -58,7 +59,8 @@ func runWebServer(ctx context.Context, d *db.DB, site providers.Site, model, add
 	mux.HandleFunc("/chart/", func(w http.ResponseWriter, r *http.Request) {
 		serveIndex(w, sub)
 	})
-	mux.Handle("/", http.FileServer(http.FS(sub)))
+	mux.Handle("/vendor/", withCacheControl("public, max-age=31536000, immutable", staticFiles))
+	mux.Handle("/", staticFiles)
 
 	srv := &http.Server{
 		Addr:              addr,
@@ -196,3 +198,10 @@ func parseTimeParam(v string) (time.Time, error) {
 	}
 	return time.Time{}, errors.New("unsupported time format")
 }
+
+func withCacheControl(cacheControl string, next http.Handler) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("Cache-Control", cacheControl)
+		next.ServeHTTP(w, r)
+	})
+}