Add automated setup script for tunnel management

- setup.sh: Script interactivo que verifica/crea el tunnel automáticamente
- Detecta si ya existe el tunnel nucleorio-tunnel
- Instala cloudflared si no está presente
- Genera credentials.json y .env automáticamente
- Configura DNS opcionalmente
- Actualizado README con instrucciones de setup rápido
- Workflow actualizado con mejores mensajes de error

.gitea/workflows/deploy.yml

@@ -11,24 +11,18 @@ jobs:
     steps:
       - uses: actions/checkout@v3
 
-      - name: Verify credentials.json exists
+      - name: Setup tunnel if needed
         run: |
-          if [ ! -f credentials.json ]; then
-            echo "⚠️  credentials.json not found!"
-            echo "   Make sure to copy it to the repo root before deploying"
-            echo "   cp ~/.cloudflared/<TUNNEL_ID>.json ./credentials.json"
+          if [ ! -f credentials.json ] || [ ! -f .env ]; then
+            echo "⚠️  credentials.json o .env no encontrados"
+            echo "   Ejecuta './setup.sh' manualmente en el servidor para configurar el tunnel"
+            echo ""
+            echo "   O copia manualmente:"
+            echo "   - credentials.json desde ~/.cloudflared/<TUNNEL_ID>.json"
+            echo "   - .env con TUNNEL_ID configurado"
             exit 1
           fi
-          echo "✓ credentials.json found"
-
-      - name: Verify .env exists
-        run: |
-          if [ ! -f .env ]; then
-            echo "⚠️  .env file not found!"
-            echo "   Copy .env.example to .env and configure TUNNEL_ID"
-            exit 1
-          fi
-          echo "✓ .env file found"
+          echo "✓ credentials.json y .env encontrados"
 
       - name: Pull fresh cloudflared image
         run: docker compose pull