move blueprints in dedicated folder

app/blueprints/services/__init__.py

@@ -0,0 +1,24 @@
+from flask import Blueprint
+from flask_login import login_required
+from pathlib import Path
+import yaml
+
+
+services_file = Path(__file__).parent / 'services.yml'
+with services_file.open('r') as f:
+    SERVICES = yaml.safe_load(f)
+
+bp = Blueprint('services', __name__)
+
+
+@bp.before_request
+@login_required
+def before_request():
+    '''
+    Ensures that the routes in this package can only be visited by users that
+    are logged in.
+    '''
+    pass
+
+
+from . import routes  # noqa