fix: newer ubuntu version

Author: madisonmay

tox.Dockerfile

@@ -1,24 +1,24 @@
-FROM ubuntu:20.04
+FROM ubuntu:24.04
 
 ENV DEBIAN_FRONTEND=noninteractive
 
-RUN apt-get update && apt-get install -yqq apt-transport-https
+RUN apt-get update && apt-get install -yqq --no-install-recommends \
+        apt-transport-https \
+        software-properties-common && \
+    rm -rf /var/lib/apt/lists/*
 
-#deadsnakes holds old versions of python for ubuntu
-RUN apt-get install -yqq software-properties-common && \
-    add-apt-repository ppa:deadsnakes/ppa
-
-RUN apt-get update && \
-    apt-get -yqq install \
+# deadsnakes holds additional Python versions for Ubuntu
+RUN add-apt-repository -y 'ppa:deadsnakes/ppa' && \
+    apt-get update && \
+    apt-get -yqq install --no-install-recommends \
         python3.8 \
         python3.9 \
         python3.10 \
         python3.11 \
         python3.12 \
         python3.13 \
-        python3-pip
-
-RUN pip3 install tox==4.11.3
+        python3-pip && \
+    rm -rf /var/lib/apt/lists/*
 
 COPY . /indico-client
 WORKDIR /indico-client