Cache webfont files for 30 days

Author: danopia

lib/request-handling.ts

@@ -45,9 +45,16 @@ export async function servePublic(req: http.ServerRequest, path: string) {
     .catch(makeErrorResponse)
     .then(resp => req.respond(resp));
 }
+
 export async function serveFont(req: http.ServerRequest, path: string) {
   await file_server
     .serveFile(req, 'fonts/'+path)
+    .then(resp => {
+      if (resp.status === 200) {
+        resp.headers?.set('cache-control', 'public, max-age=2592000'); // 30d
+      }
+      return resp;
+    })
     .catch(makeErrorResponse)
     .then(resp => req.respond(resp));
 }