cors: add Set-Cookie to exposed headers

Signed-off-by: ATechnoHazard <amolele@gmail.com>

src/api/routes/mod.rs

@@ -8,7 +8,9 @@ pub mod user;
 
 pub fn fuel(rocket: Rocket) -> Rocket {
     let mut rocket = rocket;
-    let cors = CorsOptions::default().to_cors().unwrap();
+    let mut cors_options = CorsOptions::default();
+    cors_options.expose_headers.insert("Set-Cookie".to_owned());
+    let cors = cors_options.to_cors().unwrap();
     rocket = health::fuel(rocket);
     rocket = paste::fuel(rocket);
     rocket = user::fuel(rocket);