Modernize sources list for containerized package manager

installJRMC

@@ -435,14 +435,14 @@ get_latest_mc_version() {
   if install_package --silent buildah && 
   cnt=$(buildah from --quiet alpine:edge 2>/dev/null) &&
   buildah run "$cnt" -- sh -c \
-    "apk add apt &&
+    "apk add apt &>/dev/null &&
     cat <<-EOF > /etc/apt/sources.list.d/jriver.sources
 			Types: deb
 			URIs: https://dist.jriver.com/latest/mediacenter/
 			Suites: $1
 			Components: main
-		EOF &&
-    cat /etc/apt/sources.list.d/jriver.sources &&
+		EOF ;
+    cat /etc/apt/sources.list.d/jriver.sources ;
     apt update --allow-insecure-repositories" &&
   MC_VERSION=$(buildah run "$cnt" -- apt-cache policy mediacenter?? | grep Candidate | awk '{print $2}' | sort -V | tail -n1) &>/dev/null &&
   [[ $MC_VERSION =~ ^[0-9]+\.[0-9]+\.[0-9]+ ]]; then