added build script and Docker file

.gitignore

@@ -6,4 +6,4 @@ build/downloads/
 build/sstate-cache/
 build/tmp/
 build/bitbake-cookerdaemon.log
-
+images

Dockerfile

@@ -0,0 +1,12 @@
+FROM debian:jessie
+
+RUN apt-get update && \
+	apt-get install -y gawk wget git-core diffstat unzip texinfo gcc-multilib build-essential chrpath socat cpio python python3 python3-pip python3-pexpect  xz-utils debianutils iputils-ping locales
+
+RUN useradd -ms /bin/bash -p build build --uid 30000
+
+RUN echo "en_US.UTF-8 UTF-8" > /etc/locale.gen && locale-gen
+ENV LANG en_US.utf8
+
+USER build
+WORKDIR /home/build

build-pitrezor.sh

@@ -0,0 +1,24 @@
+#!/bin/bash
+set -e
+
+IMAGE=pitrezor-build
+TAG=${1:-master}
+IMGFILE=images/pitrezor-$TAG.img
+DOCKER_UID=30000
+
+mkdir -p images
+chown $DOCKER_UID:$DOCKER_UID images
+
+docker build -t $IMAGE .
+
+docker run -t -v $(pwd)/images:/images:z $IMAGE /bin/bash -c "\
+git clone https://github.com/heneault/yocto-pitrezor.git && \
+cd yocto-pitrezor && \
+git checkout $TAG && \
+git submodule update --init && \
+. poky/oe-init-build-env build && \
+bitbake pitrezor-image && \
+cp tmp/deploy/images/raspberrypi0-wifi/pitrezor-image-raspberrypi0-wifi.rpi-sdimg /$IMGFILE"
+
+zip -m -j -9 ${IMGFILE%.img}.zip $IMGFILE
+