Added Dockerfile for required build environment

[realAkhmed]

Hello everyone! I experienced some considerable difficulties setting up the build environment correctly. Given that the same issue puzzles others as well as referenced by #15 #18 #19, I created a Dockerfile that creates a container (virtual machine) with full build environment (including IDEA) required to run the "Hello World" example.

How to use it?

• Install Docker for Linux, for Windows or for OS X
• Then run the following:

$ git clone https://github.com/pocorall/hello-scaloid-sbt/
$ cd hello-scaloid-sbt/
$ docker build -t scaloid .

this last line will start downloading packages and building the container for you. (Note: it will download several GBs)

Once Docker is done creating the image you can run by typing the following commands on the host:

$ export XSOCK=/tmp/.X11-unix/X0
$ xhost +localhost
$ docker run --privileged -v $XSOCK:$XSOCK -v /dev/bus/usb:/dev/bus/usb -it scaloid

then you get connected to the container and inside the container you can type:

$ idea-run

to start IDEA. Xserver connection is set up so that you can run IntelliJ IDEA from inside the container.

The container will have:

• Working Debian 8 system with user "scaloid"
• Android SDK 24.3.3 + Google APIs
• SBT 0.13.8
• JDK 7
• IntelliJ IDEA 14.1.4 with SBT plugin (1.7.0) + Scala plugin (1.5.2) both pre-installed
• freshly cloned hello-scaloid-sbt project
• fully working adb: you can just connect your phone to the host machine and your phone will be fully accessible inside the container.
• the container also compiles hello-scaloid-sbt project after downloading for your convenience (no compile errors).

Any comments are welcome!

[pocorall]

Thanks! I will review your request shortly.