add status endpoint to '/'

paas were trying to ascertain if notify was up by looking at '/', for cert
renewal. This commit adds the status endpoint to '/', so we're not mistakenly
left for our cert to expire

app/status/healthcheck.py

@@ -9,6 +9,7 @@ from app import db, version
 status = Blueprint('status', __name__)
 
 
+@status.route('/', methods=['GET'])
 @status.route('/_status', methods=['GET', 'POST'])
 def show_status():
     if request.args.get('simple', None):

tests/app/status/test_status.py

@@ -1,8 +1,9 @@
+import pytest
 from flask import json
 
 
-def test_get_status_all_ok(client):
-    path = '/_status'
+@pytest.mark.parametrize('path', ['/', '/_status'])
+def test_get_status_all_ok(client, notify_db_session, path):
     response = client.get(path)
     assert response.status_code == 200
     resp_json = json.loads(response.get_data(as_text=True))