combined commands

CMakeLists.txt

 # Copyright (C) 2018 Ola Benderius
+# Copyright (C) 2022 Björnborg Nguyen
 #
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by

Dockerfile

@@ -42,9 +42,7 @@ RUN apt-get update && apt-get install -y \
   libqt5widgets5 \
   libboost-program-options-dev \
   libdrm-dev libexif-dev pkg-config \
-  libpng-dev
-
-RUN apt-get update && apt-get install -y \
+  libpng-dev \
   libxv-dev
 
 WORKDIR /opt/sources