Probe endpoints

[laurigates]

I did a bit of housekeeping and implemented rudimentary liveness & readiness endpoints.

I reorganized the files a bit to get __name__ to resolve to the service name. It felt like there should be a simpler way, but at least this works. The reason was to get this part working:

@app.route("/")
def hello():
    return "{name} {version}".format(name=__name__, version=__version__)

So the root URL returns the service name and the dynamically generated version string of the running build.