Add method to count of live services and orgs

So that we don’t have to update the home page manually any more.

app/status/healthcheck.py

@@ -5,6 +5,8 @@ from flask import (
 )
 
 from app import db, version
+from app.dao.services_dao import dao_count_live_services
+from app.dao.organisation_dao import dao_count_organsations_with_live_services
 
 status = Blueprint('status', __name__)
 
@@ -23,6 +25,14 @@ def show_status():
             db_version=get_db_version()), 200
 
 
+@status.route('/_status/live-service-and-organisation-counts')
+def live_service_and_organisation_counts():
+    return jsonify(
+        organisations=dao_count_organsations_with_live_services(),
+        services=dao_count_live_services(),
+    ), 200
+
+
 def get_db_version():
     query = 'SELECT version_num FROM alembic_version'
     full_name = db.session.execute(query).fetchone()[0]