community-profiles: create profile for Fürstenwalde

New profile for Fürstenwalde. At the moment we use parts of the Berlin-
infrastructure. Thus I have not changed the ip-address-related things.

Signed-off-by: Martin Hübner <martin.hubner@web.de>
[reword and rewrap commit message]
Signed-off-by: Jo-Philipp Wich <jo@mein.io>