I am running an nginx web server where I redirect all http requests to https (with a self signed cert).

Here is how I REDIRECT all http requests to https in the nginx config file:

server { 
listen 80 default_server; 
listen [::]:80 default_server ipv6only=on; 
server_name my.server.ip; 
return 301 https://$server_name$request_uri;

Problem is - I cannot seem to do so for an app running on a port. Example:

http://my.server.ip:1234 does not redirect to https://my.server.ip:1234

ir works fine on all other urls like http://my.server.ip/temp etc.

How can I modify the nginx config file to force that app url through ssl?