gistfile1.txt

-module(z_app).
-behaviour(application)

-export([start/2, prep_stop/1]).

start(_StartType, _StartArgs) ->
    {ok, Pid} = z_sup:start_link(),
    Dispatch = …,

    cowboy:start_http(z_app_listener, 100,
                      [{port, 8080}],
                      [{middlewares, [
                                                cowboy_router,
                                                cowboy_cors,
                                                cowboy_handler
                                               ]},
                       {env, [
                          {cors_policy, z_policy},
                          {dispatch, Dispatch}]}]),
    {ok, Pid}.

prep_stop(_State) ->
    cowboy:stop_listener(z_app_listener),
    ok.