After activating HTTPS Discourse doesn´t work

Support Self-hosting
4

If this is a standard Docker install, you’ll also need to enter the app first.

cd /var/discourse
./launcher enter app

Assuming that succeeds, you can print line 46 of the config file with sed:

sed -n '46p' /etc/nginx/conf.d/discourse.conf

With the same templates as you and no specific modifications to that config file, I see this:

  return 301 https://discourse.softpress.com$request_uri;