http-verbs-get-to-post-csrf

modified:   .gitignore
modified:   development.ini
modified:   make_post_sell/static/css/common.css
modified:   make_post_sell/templates/cart.j2
modified:   make_post_sell/templates/cart_checkout.j2
modified:   make_post_sell/templates/product.j2
modified:   make_post_sell/templates/snippets/csrf.j2
modified:   make_post_sell/views/cart.py

Summary by CodeRabbit

• New Features
  • All cart and checkout actions now use secure POST forms with CSRF protection, enhancing security for adding, removing, and updating products in the cart.
• Bug Fixes
  • Improved transactional integrity during checkout to ensure that database changes only occur after successful payment.
• Style
  • Unified button styles for both anchor and button elements, ensuring consistent appearance across cart and product actions.
• Chores
  • Updated session cookie settings for improved security and domain handling.
  • Excluded the data directory from version control.