Some changes as suggested by JD's Jiaz:

- Send another user agent with wget
 - Strip down needed information for my.jdownloader settings file

Dockerfile

@@ -6,7 +6,7 @@ MAINTAINER PlusMinus <piddlpiddl@gmail.com>
 # Create directory, downloader JD" and start JD2 for the initial update and creation of config files.
 RUN \
 	mkdir /opt/JDownloader/ && \
-	wget -O /opt/JDownloader/JDownloader.jar --progress=bar:force http://installer.jdownloader.org/JDownloader.jar && \
+	wget -O /opt/JDownloader/JDownloader.jar --user-agent="https://hub.docker.com/r/plusminus/jdownloader2-headless/" --progress=bar:force http://installer.jdownloader.org/JDownloader.jar && \
 	java -Djava.awt.headless=true -jar /opt/JDownloader/JDownloader.jar
 
 

README.md

@@ -6,25 +6,7 @@ Headless JDownloader 2 Docker Container
 1. Create a folder on your host for the configuration files (eg. sudo mkdir /config/jd2)
 2. run `docker run -d --name jd2 -v /config/jd2:/opt/JDownloader/cfg -v /home/user/Downloads:/root/Downloads plusminus/jdownloader2-headless`
 3. stop the container `docker stop jd2`
-4. On your host, edit the file `org.jdownloader.api.myjdownloader.MyJDownloaderSettings.json` to match the content below
+4. On your host, enter your credentials to the file `org.jdownloader.api.myjdownloader.MyJDownloaderSettings.json` as in `{ "password" : "mypasswort", "email" : "email@home.org" }`
 5. Start the container
 
-`{
-  "uniquedeviceidsaltv2" : "i don't know whats supposed to be in here",
-  "autoconnectenabledv2" : true,
-  "debugenabled" : false,
-  "lastupnpport" : 0,
-  "lastlocalport" : 58103,
-  "connectip" : "api.jdownloader.org",
-  "latesterror" : "NONE",
-  "manuallocalport" : 3129,
-  "password" : "mypasswort",
-  "clientconnectport" : 80,
-  "directconnectmode" : "LAN",
-  "devicename" : "JDownloader@docker",
-  "manualremoteport" : 3129,
-  "uniquedeviceidv2" : "same as above",
-  "email" : "email@home.org"
-}`
-