Restructured some things and made 1000:100 the default user. Added debian base image, tests and update README.md

common/entrypoint.sh

@@ -0,0 +1,32 @@
+#!/bin/sh
+
+# Set defaults for uid and gid to not be root
+if [ -n $GID ]; then GID=100;  fi
+if [ -n $UID ]; then UID=1000; fi
+
+if [ "$GID" -ne "0" ]; then
+	GROUP=jdownloader
+	groupadd -g $GID $GROUP
+else
+	GROUP=root
+fi
+
+if [ "$UID" -ne "0" ]; then
+    USER=jdownloader
+
+    # Create user without home (-M) and remove login shell
+    useradd -M -s /bin/false -g $GID -u $UID $USER
+else
+    USER=root
+    usermod -ag $GID
+fi
+
+chown -R $UID:$GID /opt/JDownloader
+
+# Sometimes this gets deleted. Just copy it every time.
+cp /opt/JDownloader/sevenzip* /opt/JDownloader/libs/
+
+su-exec ${UID}:${GID} "$@"
+
+# Keep container alive when jd2 restarts
+while sleep 3600; do :; done