sogo_ynh/conf/nginx.conf

    # SOGo Proxying
    location ^~ VARPATH {
        proxy_pass http://127.0.0.1:20000;
        proxy_redirect http://127.0.0.1:20000/SOGo/ /SOGo;
        # forward user's IP address
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header Host $host;
        proxy_set_header x-webobjects-server-protocol HTTP/1.0;
        proxy_set_header x-webobjects-remote-host 127.0.0.1;
        proxy_set_header x-webobjects-server-name $server_name;
        proxy_set_header x-webobjects-server-url $scheme://$host;
        include conf.d/yunohost_panel.conf.inc;
    }

    # For IOS 7
    location = /principals/ {
        rewrite ^ https://$server_name/SOGo/dav;
        allow all;
    }


    location VARPATH.woa/WebServerResources/ {
        alias /usr/lib/GNUstep/SOGo/WebServerResources/;
    }
    location VARPATH/WebServerResources/ {
        alias /usr/lib/GNUstep/SOGo/WebServerResources/;
    }
    location ^VARPATH/so/ControlPanel/Products/([^/]*)/Resources/(.*)$ {
        alias /usr/lib/GNUstep/SOGo/$1.SOGo/Resources/$2;
    }