Update Dockerfile

Dockerfile

 FROM debian
 RUN sed -i 's|http://|https://|g' /etc/apt/sources.list
-RUN apt-get update && apt-get install -y ca-certificates wget gnupg fping gdebi p7zip-full --fix-missing 
+RUN apt-get update && apt-get install -y ca-certificates && apt-get install -y wget gnupg fping gdebi p7zip-full --fix-missing 
 RUN apt-get install -y libqtgui4 libqt4-network libqt4-xml libqt4-xmlpatterns libqt4-script --fix-missing
 RUN apt-get install -y lib32z1 lib32ncurses5 lib32stdc++6 --fix-missing
 RUN wget -O /platformflashtoollite_5.8.4.0_linux_x86_64.deb https://download.01.org/android-ia/tools/platformflashtool-lite/5.8.4.0/platformflashtoollite_5.8.4.0_linux_x86_64.deb