Nginx reverse proxy configuration for Musicbrainz for when you want to access it like http://your.host/musicbrainz. This is way harder than it should be.

musicbrainz.proxy.conf

location ^~ /musicbrainz/ {
  set $musicbrainz_upstream musicbrainz;
  set $musicbrainz_baseurl /musicbrainz;
  rewrite /musicbrainz(.*) /$1 break;

  proxy_pass http://$musicbrainz_upstream:5000;
  proxy_set_header Accept-Encoding "";
  proxy_set_header Host $host;
  proxy_set_header X-Real-IP $remote_addr;
  proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

  sub_filter_once off;
  sub_filter '//localhost:5000' '$musicbrainz_baseurl';
  sub_filter '"/static' '$musicbrainz_baseurl';
  sub_filter '"http://$host/' '"$scheme://$host$musicbrainz_baseurl/';
  sub_filter '<a href="/' '<a href="$musicbrainz_baseurl/';
}