add note cache headers

webapp/src/lib/model/EncryptedNote.ts

@@ -1,7 +1,7 @@
 export type EncryptedNote = {
 	id: string;
 	insert_time: Date;
-	expiry_time: Date;
+	expire_time: Date;
 	ciphertext: string;
 	hmac: string;
 };

webapp/src/routes/note/[id].svelte

@@ -10,9 +10,14 @@
 			try {
 				const note: EncryptedNote = await response.json();
 				note.insert_time = new Date(note.insert_time as unknown as string);
-				note.expiry_time = new Date(note.expiry_time as unknown as string);
+				note.expire_time = new Date(note.expire_time as unknown as string);
+				const maxage = Math.floor((note.expire_time.valueOf() - note.insert_time.valueOf()) / 1000);
 				return {
 					status: response.status,
+					cache: {
+						maxage: maxage,
+						private: false
+					},
 					props: { note }
 				};
 			} catch {