Setup

Software

This code works with Raspberry Pi 3 with Jessie 8 Lite OS
Install newest node and npm (at time of writing this text version 8.2.1 of node and version 5.3 of npm was avaliable)
- curl https://raw.githubusercontent.com/creationix/nvm/master/install.sh | bash
- source ~/.bashrc
- nvm install stable
- Test the installation with node -v and npm -v
Update system with sudo apt-get update and then sudo apt-get upgrade (without it next step may not work)
Install mpc and mpd (sudo apt-get install mpc mpd)
Add some radio station (for example from https://www.internet-radio.com/stations/chillout/; open any .pls file and find station url) to music player: mpc add https://www.internet-radio.com/stations/chillout/ and test it with mpc play
Install git with sudo apt-get install git -y
Clone this repo to Raspberry Pi machine (git clone https://github.com/tBlabs/RaspberryPiDemo.Machine)
Create manually .env file. Add HOST={url of server side} entry (copy link directly from browser address bar)
Run npm i to install node_modules
In case of any problems run npm rebuild. If rebuild will hang on this kind of message: make: Warning: File '../../../../.node-gyp/8.2.1/include/node/common.gypi' has modification time 1219765 s in the future ACTION Regenerating Makefile update system clock with sudo sntp -s time.google.com
Execute main script (machine.js) without sudo permissions (GPIO will not start with sudo) or add entry ./startup.sh to .bashrc file

Download Jessie Lite from https://www.raspberrypi.org/downloads/raspbian/
Burn OS image with Etcher https://www.raspberrypi.org/documentation/installation/installing-images/README.md
Put SD card to Raspberry and power on
Login with pi and raspberry password
Open config with sudo raspi-config
In Boot Options select Desktop / CLI and then Console Autologin
In Interfacing Options enable SSH if you gonna use it
Change User Password and Hostname to pi if you like
Switch to "normal keyboard layout" with sudo nano /etc/default/keyboard and change XKBLAYOUT="gb" on XKBLAYOUT="us". Exit nano with Ctrl+X and then Y and then Enter (^X = Ctrl+X)
Reboot with sudo reboot
Enable wifi by adding entry to /etc/wpa_supplicant/wpa_supplicant.conf at the end: network={<new line><tab>ssid="<network name>"<new line><tab>psk="<password>"<new line>}
Reboot again
Test internet connection with ping www.wp.pl. Interrupt with Ctrl+C
Now Raspberry is ready to action :)

In command line write hostname -I to obtain Raspberry IP
Enable SSH (if you didn't already): sudo raspi-config > Interfacing Options > enable SSH