Add initial (trivial) pubsub module and faas module that supports pubsub

Relates #3 (closed)

Follow up MRs or split tickets for alerting and working dead letter queue

example/test.py

@@ -53,3 +53,14 @@ def test_client_receive_event(capsys, event_app_client):
     )
     captured = capsys.readouterr()
     assert captured.out == "Received event data: {'event': 'yes!'}\n"
+
+
+def test_status_and_healthy(event_app_client):
+    eac = event_app_client(target="say_hello", source="example/main.py")
+    response = eac.get("/healthy")
+    assert response.status_code == 200
+    assert response.text == "ok"
+
+    response = eac.get("/status")
+    assert response.status_code == 200
+    assert response.text == "ok"