Upgrade python version to 3.13

Change-Id: Iac995c4cf6521a33207e9ec228f49a53c3a23ec8
Signed-off-by: garciadeblas <gerardo.garciadeblas@telefonica.com>
diff --git a/Dockerfile b/Dockerfile
index 27ab273..9907797 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,3 +1,6 @@
+#######################################################################################
+# 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
@@ -10,36 +13,18 @@
 # 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 31z4/tox
 
-FROM ubuntu:22.04
+USER root
 
-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 set -eux; \
+    apt-get update; \
+    apt-get install -y --no-install-recommends patch wget libmagic-dev; \
+    rm -rf /var/lib/apt/lists/*
 
-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 \
-        python3-pip \
-        tox
+COPY entrypoint.sh /entrypoint.sh
+RUN chmod +x /entrypoint.sh
 
-ENV LC_ALL C.UTF-8
-ENV LANG C.UTF-8
+ENTRYPOINT ["/entrypoint.sh"]
+CMD ["devops-stages/stage-test.sh"]