Add quiet flags to apt-get

Also removed one `apt-get update` as there are no repo changes

Author: dennorske

docker/server.Dockerfile

@@ -4,11 +4,11 @@ FROM $BASE
 
 # install dependencies
 RUN dpkg --add-architecture i386
-RUN apt-get update && apt-get install -y software-properties-common
+RUN apt-get -qq update && apt-get -qq install -y software-properties-common
 RUN add-apt-repository ppa:deadsnakes/ppa
-RUN apt-get update && apt-get install -y python3.8:i386 libpython3.8:i386
-RUN apt-get update && apt-get install -y libstdc++6:i386
+RUN apt-get -qq update && apt-get -qq install -y python3.8:i386 libpython3.8:i386
+RUN apt-get install -y libstdc++6:i386
 
 WORKDIR /server
 
-CMD "./start_server.sh"
+CMD "./start_server.sh"