(placeholder)

directory_root is set to /storage, which is a volume.

settings are stored at /opt/btsync/.sync, which is also a volume. Keep this volume separate for auth/key persistence.

for me, using nginx to serve the Web UI at a non-root URL over SSL, the following nginx config worked:

location /btsync/ {
  rewrite /btsync/ /btsync/gui/ redirect;
}
location /gui/ {
  rewrite /gui(.*) /btsync/gui$1 last;
}
location /btsync/gui/ {
  proxy_pass http://localhost:8888/gui/;
}