doc: formulate sentence more naturally
@@ -191,7 +191,7 @@ verified or added to build Elektra correctly:
### Add a Jenkins node
A node needs to have a JRE (Java Runtime Environment) installed.
Further it should run an SSH (Secure SHell) server.
-For Docker nodes Docker has to be installed as well.
+If you want to provide environments via Docker you need to install that as well.
A `jenkins` user with 47000:47000 ids should be created as this is what is
expected in Docker images.
