Resin.io DockerFile - Node, Bower, Chromium

Dockerfile.template

FROM resin/%%RESIN_MACHINE_NAME%%-node:6.9.1

RUN apt-get update \
  && apt-get install -y \
    chromium-browser \
    fbset \
    htop \
    libnss3 \
    libraspberrypi-bin \
    lsb-release\
    matchbox \
    psmisc \
    sqlite3 \
    ttf-mscorefonts-installer \
    x11-xserver-utils \
    xserver-xorg \
    xinit \
    xwit

RUN mkdir -p /usr/src/app \
  && ln -s /usr/src/app /app

WORKDIR /usr/src/app

COPY . /usr/src/app

RUN echo "allowed_users=anybody" > /etc/X11/Xwrapper.config

CMD bash -C "/app/spawn_screen";"bash"

spawn_screen

#!/bin/bash

#Libraries need a ldconfig

ldconfig

echo $URL > /usr/src/app/url.txt

useradd -m pi

gpasswd -a pi video

cp /app/xinitrc /home/pi/.xinitrc;
chown pi: /home/pi/.xinitrc

su - pi -c startx &

xinitrc

#!/bin/bash
while true; do

	# Clean up previously running apps, gracefully at first then harshly
	killall -TERM chromium 2>/dev/null;
	killall -TERM matchbox-window-manager 2>/dev/null;
	sleep 2;
	killall -9 chromium 2>/dev/null;
	killall -9 matchbox-window-manager 2>/dev/null;

	# Clean out existing profile information
	rm -rf /home/pi/.cache;
	rm -rf /home/pi/.config;
	rm -rf /home/pi/.pki;

	# Generate the bare minimum to keep Chromium happy!
	mkdir -p /home/pi/.config/chromium/Default
	sqlite3 /home/pi/.config/chromium/Default/Web\ Data "CREATE TABLE meta(key LONGVARCHAR NOT NULL UNIQUE PRIMARY KEY, value LONGVARCHAR); INSERT INTO meta VALUES('version','46'); CREATE TABLE keywords (foo INTEGER);";

	# Disable DPMS / Screen blanking
	xset -dpms
	xset s off

	# Reset the framebuffer's colour-depth
	fbset -depth $( cat /sys/module/*fb*/parameters/fbdepth );

	# Hide the cursor (move it to the bottom-right, comment out if you want mouse interaction)
	xwit -root -warp $( cat /sys/module/*fb*/parameters/fbwidth ) $( cat /sys/module/*fb*/parameters/fbheight )

	# Start the window manager (remove "-use_cursor no" if you actually want mouse interaction)
	matchbox-window-manager -use_titlebar no -use_cursor no &

	# Start the browser (See http://peter.sh/experiments/chromium-command-line-switches/)
	chromium  --app=$( cat /usr/src/app/url.txt )

done;

Exactly what I was looking for! But this didn't work out of the box. Error:
rse_vt_settings: Cannot open /dev/tty0 (Permission denied)

If I add: gpasswd -a pi tty
I get:
f86OpenConsole: Cannot open virtual console 2 (Permission denied)

Have been sreaching but without any answer. Try xrandr but getting "Cant open display".
I have a HDMI Display and I can see Resin boot screen but after boot its just black.