Use pathlib where possible

app/services/__init__.py

@@ -1,12 +1,11 @@
 from flask import Blueprint
 from flask_login import login_required
-import os
+from pathlib import Path
 import yaml
 
 
-services_file = \
-    os.path.join(os.path.dirname(os.path.abspath(__file__)), 'services.yml')
-with open(services_file, 'r') as f:
+services_file = Path(__file__).parent / 'services.yml'
+with services_file.open('r') as f:
     SERVICES = yaml.safe_load(f)
 
 bp = Blueprint('services', __name__)