Fix broken python3 dependency for Dockerfile-devel (#135)

The old package is no longer available in the new stable Debian release.

Author: eandersson

Dockerfile-devel

@@ -20,7 +20,8 @@ RUN apt-get update && apt-get install --no-install-recommends --no-install-sugge
     'git' \
     'libncurses5-dev' \
     'libssl-dev' \
-    'python3-distutils' \
+    'python3' \
+    'python3-setuptools' \
     'rsync' \
     'unzip' \
     'zlib1g-dev' \