feat: Add Gitea Actions pipeline and Docker deployment config

GEMINI.md

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+# GEMINI.md - Project Context & Conventions
+
+## Project Overview
+**Name:** car-auto-center (CMS - Automotivo)
+**Type:** SPA (Single Page Application)
+**Stack:** React 19, TypeScript, Vite, Tailwind CSS
+**State Management:** React Context (`DataContext`) + Supabase
+**Routing:** React Router v7
+
+## Architecture
+- **Entry Point:** `index.tsx` mounts `App.tsx`.
+- **Routing:** Defined in `App.tsx`. Includes Public (`/`) and Admin (`/admin`) routes.
+- **Data Flow:**
+    - `contexts/DataContext.tsx` provides global state (settings, content).
+    - `lib/supabase.ts` handles Supabase connection.
+    - `data.ts` contains initial/mock data and constants.
+    - `types.ts` defines all shared TypeScript interfaces.
+- **Components:**
+    - `components/`: Reusable UI components.
+    - `components/Pages.tsx`: Route page components (Home, About, etc.).
+    - `components/Admin/`: Admin-specific views (Login, Dashboard).
+
+## Key Technologies
+- **Build Tool:** Vite
+- **Styling:** Tailwind CSS (utility-first), `clsx`, `tailwind-merge`.
+- **Icons:** `lucide-react`.
+- **Backend:** Supabase (Auth/DB) - *Note: Local storage fallback usage observed in code.*
+
+## Conventions
+- **Naming:** PascalCase for components, camelCase for functions/variables.
+- **File Structure:**
+    - Components co-located in `components/`.
+    - Pages often aggregated in `Pages.tsx` (consider splitting if growing).
+- **Env Vars:** Prefix with `VITE_` for client-side exposure.
+    - `VITE_SUPABASE_URL`
+    - `VITE_SUPABASE_ANON_KEY`
+
+## Development
+1. **Install:** `npm install`
+2. **Dev Server:** `npm run dev` (Port 3000)
+3. **Build:** `npm run build`
+
+## Deployment (Pipeline)
+- Target: Portainer (Docker).
+- Registry: Gitea Container Registry.
+- CI/CD: Gitea Actions.