added "update" command

Dockerfile

@@ -21,7 +21,9 @@ RUN apt-key add /tmp/linux_signing_key.pub \
 	&& rm -rf /var/cache/* /var/log/apt/* /tmp/* \
 	&& addgroup chrome-remote-desktop \
 	&& useradd -m -G chrome-remote-desktop,pulse-access chrome \
-	&& chmod +x /crdonly
+	&& ln -s /crdonly /usr/local/sbin/crdonly \
+	&& ln -s /update /usr/local/sbin/update \
+	&& ln -s /update /etc/cron.hourly/update
 
 VOLUME ["/home/chrome"]
 

copyables/etc/supervisor/conf.d/supervisord-crdonly.conf

@@ -7,3 +7,9 @@ command=/usr/bin/python /opt/google/chrome-remote-desktop/chrome-remote-desktop
 user=chrome
 autorestart=true
 priority=200
+
+[program:cron]
+command=/usr/sbin/cron -f
+user=root
+autorestart=true
+priority=100

copyables/install.sh

@@ -1,31 +0,0 @@
-#!/bin/bash
-set -e
-
-cd /tmp
-
-apt-get update
-
-DEBIAN_FRONTEND=noninteractive \
-	apt-get install -y wget gdebi-core pulseaudio
-
-wget https://dl.google.com/linux/direct/google-chrome-stable_current_amd64.deb
-wget https://dl.google.com/linux/direct/chrome-remote-desktop_current_amd64.deb
-
-DEBIAN_FRONTEND=noninteractive gdebi -n *.deb
-
-rm *.deb
-
-apt-get purge -y wget gdebi-core
-apt-get autoremove --purge -y
-apt-get clean
-
-rm -rf /var/lib/apt/* /var/lid/dpkg/* /var/cache/* /var/log/apt/*
-
-addgroup chrome-remote-desktop
-useradd -m -G chrome-remote-desktop,pulse-access chrome
-
-cd /
-
-chmod +x /crdonly
-
-exit 0

copyables/update

@@ -0,0 +1,18 @@
+#!/bin/bash
+set -e
+
+apt-get update -qq \
+	-o Dir::Etc::sourcelist="sources.list.d/google-chrome.list" \
+	-o Dir::Etc::sourceparts="-" \
+	-o API::Get::List-Cleanup="0"
+
+for pkg in "google-chrome-stable"; do
+
+        IFS=": " read -r p i iv c cv x <<< $(apt-cache policy $pkg)
+
+        if [ "$iv" != "$cv" ]; then
+                apt-get install --only-upgrade -y -qq $pkg
+                echo $pkg upgraded to $cv
+        fi
+
+done