exchange/debian/etc-taler-exchange/nginx/sites-available/taler-exchange

location /taler-exchange/ {
         proxy_pass http://unix:/run/taler/exchange/exchange-http.sock;
         proxy_redirect off;
         proxy_set_header Host $host;
         proxy_set_header X-Forwarded-Host "example.com";
         proxy_set_header X-Forwarded-Proto "https";
}