remove SMTP server from dev and use console logs instead.

modified: Makefile modified: README.rst modified: make_post_sell/lib/mail.py modified: make_post_sell/request_methods.py

Summary by CodeRabbit

Release Notes

• New Features

  • Added a new "Contributing" section to the project README with guidelines for collaboration.
  • Introduced a method to check debug toolbar status in the request object.

• Documentation

  • Updated README with a new "Licence" section.
  • Improved code documentation and comments in the mail library.

• Deployment

  • Enhanced GitLab CI configuration with conditional deployment rules.

• Maintenance

  • Removed mock SMTP server target from Makefile.
  • Improved error handling in the email sending function.