lighten mail handler

email_handler.py

@@ -99,7 +99,7 @@ from app.models import (
 from app.pgp_utils import PGPException
 from app.utils import random_string
 from init_app import load_pgp_public_keys
-from server import create_app
+from server import create_app, create_light_app
 
 _IP_HEADER = "X-SimpleLogin-Client-IP"
 _MAILBOX_ID_HEADER = "X-SimpleLogin-Mailbox-ID"
@@ -107,7 +107,7 @@ _MAILBOX_ID_HEADER = "X-SimpleLogin-Mailbox-ID"
 # fix the database connection leak issue
 # use this method instead of create_app
 def new_app():
-    app = create_app()
+    app = create_light_app()
 
     @app.teardown_appcontext
     def shutdown_session(response_or_exc):

server.py

@@ -81,6 +81,18 @@ if SENTRY_DSN:
 os.environ["OAUTHLIB_INSECURE_TRANSPORT"] = "1"
 
 
+def create_light_app() -> Flask:
+    app = Flask(__name__)
+    app.config["SQLALCHEMY_DATABASE_URI"] = DB_URI
+    app.config["SQLALCHEMY_TRACK_MODIFICATIONS"] = False
+
+    app.secret_key = FLASK_SECRET
+
+    init_extensions(app)
+
+    return app
+
+
 def create_app() -> Flask:
     app = Flask(__name__)
     # SimpleLogin is deployed behind NGINX