Location-Filtered Group Link Portal

I need a full-stack MERN web application that lets people publish and discover group-chat links. Users will be able to submit WhatsApp, Telegram, and Instagram group invitations, tag each post with one or more locations they select, add a short description, and then share it publicly on the site. Visitors should, in turn, filter the feed by location, view matching posts, and join the groups directly from the link section.

Account creation must rely on phone number verification or email or social logins. A one-time code flow (Twilio or similar) is fine as long as it is secure and reusable for sign-ins.

Key features I expect:
• React front-end with a clean feed, submission form, map-style or dropdown location picker, and responsive design.
• Node/Express API handling authentication, CRUD for posts, and search filtering by location.
• MongoDB schema for users, posts, and location data, indexed for quick queries.
• Secure SMS verification workflow integrated end-to-end.
• Basic admin dashboard to moderate or remove links if required.
• Deployment script or guide so I can launch the service on a standard VPS or cloud host.

Acceptance criteria:
1. A new user can register with a phone number, receive an SMS code, and log in.
2. An authenticated user can create, edit, and delete their own post containing: link, description body, and chosen location tags.
3. An unauthenticated visitor can browse and filter posts by location but must sign up to add a link.
4. Filtering returns relevant results in under two seconds for 10k+ records.
5. Codebase is delivered in a public or private Git repository with README covering local setup and production deployment steps.

If something in the flow seems unclear, flag it before you build so we stay aligned.