docker-image folder added

The docker-images where scattered across different files.
For faster access i moved them to an extra folder and linked them if they're needed elsewhere.
entries that where outside this folder and only contained basic documentation of the docker image where removed.

wiki/openvpn.md

@@ -1,44 +0,0 @@
-# OpenVPN
-
-## Setup Server with Docker
-
-The official container and documentation was made by [kylemanna](https://hub.docker.com/r/kylemanna/openvpn).
-
-### Volumes
-
-Set the following volumes with the -v tag.
-
-| Volume-Name | Container mount | Description              |
-| ----------- | --------------- | ------------------------ |
-| `ovpn`      | `/etc/openvpn`  | storage for openvpn data |
-
-### Ports
-
-Set the following ports with the -p tag.
-
-| Container Port | Recommended outside port | Protocol | Description  |
-| -------------- | ------------------------ | -------- | ------------ |
-| `1194`         | `1194`                   | UDP      | openvpn port |
-
-### Additional
-
-There are some special variables to set.
-
-| Flag        | Usage                  |
-| ----------- | ---------------------- |
-| `--cap-add` | add linux capabilities |
-
-### Rebuild
-
-```shell
-#!/bin/sh
-docker stop openvpn
-docker rm openvpn
-docker pull kylemanna/openvpn
-docker run --name openvpn \
-    --restart unless-stopped \
-    --cap-add=NET_ADMIN \
-    -p 1194:1194/udp \
-    -v ovpn:/etc/openvpn \
-    -d kylemanna/openvpn
-```