Fix port retrieval and indentation in app.py

app.py

@@ -3,7 +3,6 @@ from flask import Flask, render_template, request, redirect, url_for, send_from_
 from flask_sqlalchemy import SQLAlchemy
 from flask import abort, jsonify
 
-
 app = Flask(__name__, static_folder='static')
 app.config['SEND_FILE_MAX_AGE_DEFAULT'] = 0
 app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///site.db'
@@ -67,7 +66,6 @@ def download_cv():
     print(f"Attempting to serve file: {file_path}")
     return send_from_directory('static', 'my-cv.docx', as_attachment=True, mimetype='application/docx')
 
-
 @app.route('/download_assessment/<filename>')
 def download_assessment(filename):
     try:
@@ -86,7 +84,7 @@ if __name__ == '__main__':
     # Create database tables
     with app.app_context():
         db.create_all()
-    
+
     # Retrieve the assigned port or default to 5000
     port = int(os.environ.get('PORT', 5000))