integrated software-properties-common changes from dev branch

debian/Containerfile

@@ -24,7 +24,7 @@ RUN rm /etc/localtime && \
 # Install packages
 RUN apt update -y && \
     apt upgrade -y && \
-    apt install -y init sudo wget nano less man-db unzip rsync procps && \
+    apt install -y init sudo wget nano less man-db unzip rsync procps software-properties-common && \
     apt autoremove -y --purge && \
     apt clean -y
 

valheim/Containerfile

@@ -19,7 +19,7 @@ ARG FILESUID=5000
 ###
 
 # install basic packages 
-RUN apt update -y && apt install -y software-properties-common libsdl2-2.0-0 zip
+RUN apt update -y && apt install -y libsdl2-2.0-0 zip
 
 # install steamcmd
 RUN apt-add-repository contrib && \