Refactor and merge Zach's work into main

create_app.py

@@ -0,0 +1,40 @@
+from flask import Flask
+from flask_sqlalchemy import SQLAlchemy
+from flask_login import LoginManager
+
+# init SQLAlchemy
+db = SQLAlchemy()
+
+
+def create_app():
+    app = Flask(__name__)
+
+    app.config['SECRET_KEY'] = 'secret key goes here'
+    app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///db.sqlite'
+    app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = False
+
+    db.init_app(app)
+
+    login_manager = LoginManager()
+    login_manager.login_view = 'auth.login'
+    login_manager.init_app(app)
+
+    from .models import User
+
+    @login_manager.user_loader
+    def load_user(user_id):
+        return User.query.get(int(user_id))
+
+    from .auth import blueprint as auth_blueprint
+    app.register_blueprint(auth_blueprint)
+
+    from .routes import blueprint as routes_blueprint
+    app.register_blueprint(routes_blueprint)
+
+    # CLI commands setup
+    @app.shell_context_processor
+    def shell_context():
+        """Provides specific Flask components to the shell."""
+        return {'app': app, 'db': db}
+
+    return app