Force Redirect HTTP to HTTPS on nginx behind ELB

webapp.conf

# redirect http to https
set $redirect "";
if ($http_x_forwarded_proto != 'https') {
  set $redirect "1";
}
if ($http_user_agent !~* ELB-HealthChecker) {
  set $redirect "${redirect}1";
}
if ($http_host ~ "your-nifty-domain.com") {
  set $redirect "${redirect}1";
}
if ($redirect = "111") {
  rewrite ^ https://$host$request_uri? permanent;
}