reverse-proxy: added main page

wiki/bind.md

@@ -91,6 +91,8 @@ $TTL 1D
 To make the server you operate on the nameserver select a subdomain for it and
 subsitute `<thisserver>` for it and its IP address `<ip of thisserver>`.
 More [DNS records](./dns.md#records) can be added.
+Most importantly used and needed for [reverse proxies](./reverse-proxy.md) are
+[A records](./dns.md#a-record) and [CNAME records](./dns.md#cname-record).
 
 Then create `/etc/bind/extra-zones/revp.178.168.192` and fill it with the
 following lines.

wiki/nginx.md

@@ -1,8 +1,7 @@
 # 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).
+[nginx](https://www.nginx.com/) is a web server that can be used as
+[reverse proxy](./reverse-proxy.md).
 
 ## Server
 

wiki/reverse-proxy.md

@@ -0,0 +1,12 @@
+# Reverse proxy
+
+A reverse proxy is an application that is upstream of back-end application and
+forwards clients to those.
+
+## Software that can be used as reverse proxy
+
+The following software can be used as reverse proxy.
+
+- [Traefik](./traefik.md) is a http and https reverse proxy with a special
+  integration of infrastructure components (e.g. [Docker](./docker.md))
+- [NGINX](./nginx.md) is a webserver that can be also used as a reverse proxy

wiki/traefik.md

@@ -2,7 +2,6 @@
 
 [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