Remove hardcoded subscriby.shop

[chrisjsimpson]

Is your feature request related to a problem? Please describe.

Remove hardcoded subscriby.shop

Describe the solution you'd like
Use config value SHOPS_SUBDOMAIN to store shops subdomain.

Describe alternatives you've considered

Additional context

https://github.com/Subscribie/module-builder/blob/main/__init__.py#L167-L178

[chrisjsimpson]

SUBSCRIBIE_DOMAIN is already in use. Remove hardcoded subscriby.shop at https://github.com/Subscribie/subscribie/blob/29fa7c50fdf9fe1956568f9caceca4da03e22ac8/subscribie/themes/theme-builder/builder/start-building.html#L207

[github-actions]

🚀 Issue was released in v0.0.3 🚀