Updated the dockerfile to the latest tester

Dockerfile

@@ -1,10 +1,8 @@
-# Base on Ubuntu 19.10
-FROM ubuntu:19.10
+# Base on Fedora 32
+FROM fedora:32
 # Make sure all sources are up to date
-RUN apt-get update
+RUN dnf update -y
 # Install python dependecies
-RUN apt install -y python3 python3-pip
+RUN dnf install -y python3 python3-pip
 # Install all C dependencies
-RUN apt install -y gcc-8 gdb make libasan5 libubsan0 liblsan0 libtsan0
-# Install pytest for python exercises
-RUN pip3 install -U pytest
+RUN dnf install -y gcc clang git gcc gdb make libasan libubsan liblsan libtsan