In the services.yaml a rewrite pattern is defined for /geo/
proxies:
/geo/:
rewrite: "/geocoding-service/$1"
Hence the generated /etc/nginx/conf.d/locations.conf
looks like follows:
# cat /etc/nginx/conf.d/locations.conf
location ~ ^/geo/ {
...
rewrite ^/geo/(.*) /geocoding-service/$1 break;
...
}