I want to connect to containers via nginx location blocks without making the port visible in the url, my current block is:

location ~"/name/(.*)/(.*)/([0-9])/"{
set port $3;
proxy_pass http://128.0.0.1:$port;
proxy_header Host $host;
}
I want to access the url /name/(.*)/(.*)/([0-9])/ without making the port visible in the url but performing the same action