feat(nginx): Add user/device/token locations headers mappings

Co-authored-by: S. Amir Mohammad Najafi <[email protected]>

packages/nginx/etc/nginx/templates/http.d/49-map-headers.conf.template

@@ -0,0 +1,23 @@
+# extract $bearer_token from $http_authorization header.
+# map $http_authorization $bearer_token {
+#   ~*^Bearer\s+(?<token>\S+)$ $token;
+#   default '';
+# }
+
+# extract $user_id_location from first 3 characters of `user-id` header.
+map $http_user_id $user_id_location {
+  ~^(?<prefix>.{3}) $storeRegionPerUser/$prefix/$http_user_id;
+  default '';
+}
+
+# extract $user_token_location from first 3 characters of `user-token` header.
+map $http_user_token $user_token_location {
+  ~^(?<prefix>.{3}) $storeRegionPerToken/$prefix/$http_user_token;
+  default '';
+}
+
+# extract $device_id_location from first 3 characters of `device-id` header.
+map $http_user_device $user_device_location {
+  ~^(?<prefix>.{3}) $storeRegionPerDevice/$prefix/$http_user_device;
+  default '';
+}