Use Flask-APScheduler. Move docker swarm logic to scheduler.

app/__init__.py

@@ -1,29 +1,28 @@
 from config import config
 from flask import Flask
+from flask_apscheduler import APScheduler
 from flask_login import LoginManager
 from flask_mail import Mail
 from flask_sqlalchemy import SQLAlchemy
-from .scheduler import Scheduler
-from .swarm import Swarm
+
 
 db = SQLAlchemy()
 login_manager = LoginManager()
 login_manager.login_view = 'auth.login'
 mail = Mail()
-scheduler = Scheduler()
-swarm = Swarm()
+scheduler = APScheduler()
 
 
 def create_app(config_name):
     app = Flask(__name__)
     app.config.from_object(config[config_name])
-    config[config_name].init_app(app)
 
+    config[config_name].init_app(app)
     db.init_app(app)
     login_manager.init_app(app)
     mail.init_app(app)
     scheduler.init_app(app)
-    swarm.init_app(app)
+    scheduler.start()
 
     from .auth import auth as auth_blueprint
     app.register_blueprint(auth_blueprint, url_prefix='/auth')
@@ -35,3 +34,13 @@ def create_app(config_name):
     app.register_blueprint(main_blueprint)
 
     return app
+
+
+def create_minimal_app(config_name):
+    app = Flask(__name__)
+    app.config.from_object(config[config_name])
+
+    config[config_name].init_app(app)
+    db.init_app(app)
+
+    return app