Add EventSource example

Port from extend/cowboy_examples.

examples/eventsource/src/eventsource_app.erl

@@ -0,0 +1,30 @@
+%% Feel free to use, reuse and abuse the code in this file.
+
+%% @private
+-module(eventsource_app).
+-behaviour(application).
+
+%% API.
+-export([start/2]).
+-export([stop/1]).
+
+%% API.
+
+start(_Type, _Args) ->
+	Dispatch = cowboy_router:compile([
+		{'_', [
+			{"/eventsource", eventsource_handler, []},
+			{"/", cowboy_static, [
+				{directory, {priv_dir, eventsource, []}},
+				{file, <<"index.html">>},
+				{mimetypes, {fun mimetypes:path_to_mimes/2, default}}
+			]}
+		]}
+	]),
+	{ok, _} = cowboy:start_http(http, 100, [{port, 8080}], [
+		{env, [{dispatch, Dispatch}]}
+	]),
+	eventsource_sup:start_link().
+
+stop(_State) ->
+	ok.