That should work, whats the output you get using curl or httpie.

the same config works fine for me:

$ curl -I http://127.0.0.1:8080

HTTP/1.1 301 Moved Permanently
Server: nginx/1.10.0 (Ubuntu)
Date: Mon, 05 Jun 2017 12:45:13 GMT
Content-Type: text/html
Content-Length: 194
Connection: keep-alive
Location: https://127.0.0.1:8443/ <---------------------------------------

$ http -h http://127.0.0.1:8080
HTTP/1.1 301 Moved Permanently
Connection: keep-alive
Content-Length: 194
Content-Type: text/html
Date: Mon, 05 Jun 2017 12:45:22 GMT
Location: https://127.0.0.1:8443/ <--------------------------------------
Server: nginx/1.10.0 (Ubuntu)
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