diff --git a/Dockerfile b/Dockerfile
index ac08971..f2d0e6e 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,3 +1,5 @@
+# Copyright ETSI Contributors and Others.
+#
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
 # You may obtain a copy of the License at
@@ -10,8 +12,35 @@
 # implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
+########################################################################################
+# This Dockerfile is intented for devops testing and deb package generation
+#
+# To run stage 2 locally:
+#
+#   docker build -t stage2 .
+#   docker run -ti -v `pwd`:/work -w /work --entrypoint /bin/bash stage2
+#   devops-stages/stage-test.sh
+#   devops-stages/stage-build.sh
+#
 
-FROM ubuntu:18.04
+FROM ubuntu:20.04
 
-RUN apt-get update && DEBIAN_FRONTEND=noninteractive apt-get -y install git \
-    make python3 debhelper python3-setuptools apt-utils
+ARG APT_PROXY
+RUN if [ ! -z $APT_PROXY ] ; then \
+    echo "Acquire::http::Proxy \"$APT_PROXY\";" > /etc/apt/apt.conf.d/proxy.conf ;\
+    echo "Acquire::https::Proxy \"$APT_PROXY\";" >> /etc/apt/apt.conf.d/proxy.conf ;\
+    fi
+
+RUN DEBIAN_FRONTEND=noninteractive apt-get update && \
+    DEBIAN_FRONTEND=noninteractive apt-get -y install \
+        debhelper \
+        dh-python \
+        git \
+        python3 \
+        python3-all \
+        python3-dev \
+        python3-setuptools
+
+RUN python3 -m easy_install pip==21.3.1
+RUN pip install tox==3.24.5
+