chore(nginx): add location "/download"

and redirect to existdb rest-like file service with the root "/db/data"

conf/nginx.conf

@@ -15,6 +15,9 @@ http {
         location /api {
             proxy_pass http://db:8080/exist/restxq;
         }
+        location /download {
+            proxy_pass http://db:8080/exist/rest/db/data;
+        }
         location / {
             proxy_pass http://front:80;
         }