variable for plex download location, since they have a habit of changing it

Dockerfile

@@ -2,7 +2,8 @@ FROM lsiobase/xenial
 MAINTAINER Stian Larsen, sparklyballs
 
 # package version
-ARG PLEX_WWW="https://plex.tv/downloads/latest/1?channel=8&build=linux-ubuntu-x86_64&distro=ubuntu"
+ENV PLEX_URL="https://plex.tv/downloads"
+ARG PLEX_WWW="${PLEX_URL}/latest/1?channel=8&build=linux-ubuntu-x86_64&distro=ubuntu"
 
 # global environment settings
 ENV DEBIAN_FRONTEND="noninteractive"

root/etc/cont-init.d/30-plex-update

@@ -54,10 +54,10 @@ INSTALLED=$(dpkg-query -W -f='${Version}' plexmediaserver)
 if [[ -z $VERSION && "$PLEXPASS" == "1" || $VERSION = "plexpass" ]]; then echo "VERSION=plexpass is depricated please use version latest"; fi
 
 if [[ "$VERSION" = latest || "$VERSION" = plexpass ]]; then
-	VERSION=$(curl -s "https://plex.tv/downloads/latest/1?channel=8&build=linux-ubuntu-x86_64&distro=ubuntu&X-Plex-Token=$PLEX_TOKEN"| cut -d "/" -f 5 )
+	VERSION=$(curl -s "${PLEX_URL}/latest/1?channel=8&build=linux-ubuntu-x86_64&distro=ubuntu&X-Plex-Token=$PLEX_TOKEN"| cut -d "/" -f 5 )
 	echo "Target version: $VERSION set by: latest\plexpass"
 elif [[ "$VERSION" = public ]]; then
-	VERSION=$(curl -s "https://plex.tv/downloads/latest/1?channel=8&build=linux-ubuntu-x86_64&distro=ubuntu&X-Plex-Token="| cut -d "/" -f 5 )
+	VERSION=$(curl -s "${PLEX_URL}/latest/1?channel=8&build=linux-ubuntu-x86_64&distro=ubuntu&X-Plex-Token="| cut -d "/" -f 5 )
 	echo "Target version: $VERSION set by: public"
 elif [[ -z "$VERSION" ]]; then
 	echo "Target version: Version not set, Defaulting to supplied version"
@@ -71,8 +71,9 @@ if [[ "$VERSION" == "" ]]; then
 elif [[ "$VERSION" != "$INSTALLED" ]]; then
   echo "Upgrading from version: $INSTALLED to version: $VERSION"
     while [[ $last -ne "0" ]]; do
-	  rm -f /tmp/plexmediaserver_*.deb
-	  wget -P /tmp "https://downloads.plex.tv/plex-media-server/$VERSION/plexmediaserver_${VERSION}_amd64.deb"
+	rm -f /tmp/plexmediaserver_*.deb
+	curl -o /tmp/plexmediaserver_"${VERSION}"_amd64.deb -L \
+	"${PLEX_URL}/plex-media-server/$VERSION/plexmediaserver_${VERSION}_amd64.deb"
 	  last=$?
 	done
 	[[ ! -e /tmp/plexmediaserver_"${VERSION}"_amd64.deb ]] && exit 0