docker: images optimisation: - reduced the number of layers by grouping many instructions - moved stuff which don't change a lot at the beginning, and hg/apt at the end - scripts are not now in scripts/ subdirectories - prosody.cfg.lua is added using ADD instead of getting it online - .hg/dirstate is copied in base (backend) and libervia, so mercurial revision is known - removed lot of useless WORKDIR instruction, they are replaced by "cd" inside RUN instructions - cleaning (apt-clean, rm) is done on the same instruction as the one than generate the data, to avoid useless data in layers

#!/usr/bin/env python2
# -*- coding: utf-8 -*-

# This script launch SàT PubSub with domain and secret gotten from prosody container
# it make the configuration more easy
import os, xmlrpclib

os.chdir("/usr/share/sat_pubsub")
proxy = xmlrpclib.ServerProxy("http://prosody:9999/")
domain = proxy.getenv("DOMAIN")
secret = proxy.getenv("SAT_PUBSUB_SECRET")
os.execlp("twistd", "twistd", "-n", "--pidfile", "/tmp/sat_pubsub.pid", "sat_pubsub", "--rhost", "prosody",
 "--jid", "pubsub.%s" % domain, "--secret", secret)