move to s6 overlay structure (#13)

* move to s6 overlay structure

* Use alpine:latest and latest s6

* cleanup Dockerfile

* use .env file on docker run

* change mappings so all under one folder

* Update README

* change cron default to hourly to keep things updated

* add section about editing xteve settings

* add nice 'logging' to stdout

root/etc/cont-init.d/60-chown-files

@@ -0,0 +1,9 @@
+#!/usr/bin/with-contenv bash
+
+chown -R abc:abc /config
+chown -R abc:abc /playlists
+chown -R abc:abc /guide2go
+chown -R abc:abc /xteve
+chown -R abc:abc /tmp/xteve
+
+chown -R abc:abc /home/abc