Basic Social Network Prototype Build -- 2

I need a lean, working prototype of a social-networking web app. The goal is to validate core interactions, so I only need the essentials built cleanly in Python (Django or Flask).

Core scope
• User profiles that let people sign up, edit basic details, and upload an avatar.
• A simple messaging system for one-to-one chats.
• A chronological news feed where each user can post short text updates.

Technical notes
– Backend: Python with a small, well-structured REST API and SQLite for quick setup.
– Front-end: responsive pages using plain HTML/CSS and a lightweight JS framework (Vanilla JS or minimal React) so the prototype looks good on desktop and mobile browsers.
– Authentication: email + password is fine; keep the flow straightforward.
– Clean, commented code so I can extend it later.

Deliverables
1. Source code in a public or private Git repo.
2. A brief read-me that explains setup and sample data.
3. A short hand-off call or written walkthrough showing how to run the project locally.

I’m looking for fast turnaround, maintainable code, and clear communication from start to finish.