Why if the cookie is set to secure: true, then they are not saved on the client?

Question

Node.js

I use express session + passportJS;
Everywhere and always https, all redirects go to https;
app.set('trust proxy', 1) is at the very beginning of express() initialization;

Answer 1

In general, it was necessary to change the nodejs proxy configuration in nginx:

location /api/ {
                proxy_pass  http://localhost:8080;
                proxy_redirect off;
                proxy_set_header Host $host;
                proxy_set_header X-Real-IP $remote_addr;
                proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
                proxy_set_header X-Forwarded-Proto https;
        }