Setting-up-docker-image-for-CI.md

@@ -22,7 +22,7 @@ RUN add-apt-repository ppa:ubuntu-toolchain-r/ppa
  
 # Install stuff
 RUN apt-get update && apt-get -y install \
-    g++-10 cmake git python3-dev python3-distutils
+    g++-10 cmake git python3-dev python3-distutils doxygen
 
 # Install clang 12
 RUN wget https://apt.llvm.org/llvm.sh && chmod +x llvm.sh && ./llvm.sh 12