Refactor main module to improve structure and add module docstring

main.py

@@ -1,11 +1,10 @@
-from custom_functions.prechecks.python_checks import run_python_checks
+"""Main module to run the application."""
 
-run_python_checks()
-from custom_functions.prechecks.precheck import run_precheck
-
-run_precheck()
+import os
+import yaml
 from flask import Flask
 from flask_cors import CORS
+
 from routes.react import react_bp
 from routes.api import api_bp
 from routes.remote_device_wv import remotecdm_wv_bp
@@ -15,11 +14,17 @@ from routes.user_info import user_info_bp
 from routes.register import register_bp
 from routes.login import login_bp
 from routes.user_changes import user_change_bp
-import os
-import yaml
+from custom_functions.prechecks.python_checks import run_python_checks
+from custom_functions.prechecks.precheck import run_precheck
+
+run_python_checks()
+run_precheck()
+
 
 app = Flask(__name__)
-with open(f"{os.getcwd()}/configs/config.yaml", "r") as file:
+with open(
+    os.path.join(os.getcwd(), "configs", "config.yaml"), "r", encoding="utf-8"
+) as file:
     config = yaml.safe_load(file)
 app.secret_key = config["secret_key_flask"]