Add initial project structure, including README, CONTRIBUTING, and documentation files

- Created .gitignore to exclude unnecessary files
- Added README.md with project description and core features
- Introduced CONTRIBUTING.md for development guidelines
- Established documentation files for architecture, quality requirements, and technical risks

docs/02_architecture_constraints.md

@@ -0,0 +1,25 @@
+# Architecture Constraints
+
+## Technical Constraints
+
+| Constraint | Description                                                                                         |
+| ---------- | --------------------------------------------------------------------------------------------------- |
+| Runtime    | Discord Bot must run on Node.js (Discord.js) or Python (Discord.py) per existing proposal           |
+| Hosting    | Bot process must run 24/7 — planned deployment to Coolify                                           |
+| API Limits | Discord rate limits (50 req/s per route); webhook pollers must respect YouTube/IG/TikTok quota caps |
+| OAuth2     | Web app auth must use Discord OAuth2 — no custom auth service                                       |
+| Database   | PostgreSQL or MongoDB required for mileage and state persistence                                    |
+
+## Organizational Constraints
+
+| Constraint  | Description                                                                               |
+| ----------- | ----------------------------------------------------------------------------------------- |
+| Development | Internal team only; no open-source contributions from outside                             |
+| Deployment  | Admin dashboard hosted at `admin.openmicodyssey.com` — CORS and subdomain config required |
+| Branding    | All documentation, embeds, and UI must reflect "Open Mic Odyssey" road-trip theme         |
+
+## Conventions
+
+- Git commit messages follow Conventional Commits format
+- Environment variables stored in `.env`, never committed
+- Slash commands registered via `deploy-commands` script, not manual guild config