Add core features to Memoriamobile

I have the website www.MemorIAmobile.com online, but it's practically non-functional. I need to transform it into a professional service platform that connects with the user's phone and offers a complete end-to-end experience.

The essential features I need are:

• Secure user login and registration
• A fully functional shopping cart for selling our services
• A manageable Blog/News section for publishing updates
• Seamless connection between the website and the mobile app (data synchronization, notifications, and access to contacts/photos when the user allows it)

The code must be clean, scalable, and delivered in a Git repository so we can continue iterating. I value a modern stack (e.g., React, Node, REST/GraphQL APIs) and documentation of routes, endpoints, and any keys used for phone integration.

Since I'm open to improvements, we can incorporate social media integration or other features later.
For now, focus on getting the four previous pieces ready, tested, and published on my hosting.