nginx/traefik: crosslinks

wiki/nginx.md

@@ -1,5 +1,9 @@
 # Nginx
 
+[nginx](https://www.nginx.com/) is a http reverse proxy.
+An alternative solution for this, especially when used in combination with
+[Docker images](./docker.md) is [traefik](./traefik.md).
+
 ## Server
 
 A server can be setup via docker with the

wiki/traefik.md

@@ -2,6 +2,7 @@
 
 [Traeffik](https://github.com/traefik/traefik) is a http reverse proxy with
 a special integration of infrastructure components (e.g. [Docker](./docker.md)).
+An alternative solution for this is [nginx](./nginx.md).
 
 ## Server