doc: add README

.env.example

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+ACCESS_TOKEN="A token for VKontact Music"

README.md

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+# VK Music Downloader
+
+A very simple tool to download music through VKontakte Music API.
+
+This a proof of concept.
+
+Inspired by [DatMusic](https://github.com/alashow/datmusic-api), [MyFreeMp3](https://myfreemp3cc.com/)
+
+## Features
+
+*For now*
+
+* Parse a Spotify Playlist page
+* Download a title from the playlist
+
+*TODO*
+
+* Download the html spotify page
+* Dowload all songs in a folder
+* Add proper command line options
+* Document how to get a VK access token (need php and other things this
+  is very annoying)
+* Publish on NPM
+* Add proper cli support
+* Rewrite this as a plugin for Ampache
+* Rewrite this as a plugin for Funkwhale
+
+## Goals
+
+* Try to use state of art NodeJS APIs
+* Demonstrate what we can do with 100 lines of Javascript (and an
+  infinity of dependencies, HALF OF THE WORLD LITERALY)
+
+## Usage
+
+BEWARE WIP
+
+1. `git clone THIS`
+1. `npm install`
+1. Fill the `.env` with a `ACCESS_TOKEN=` for VK [HowTo](https://github.com/vodka2/vk-audio-token)
+1. `curl https://open.spotify.com/playlist/6LgeEhc97Azxq6sinJQt6w > test.html`
+1. `node . 0` => Download the first title of the playlist