Add Dockerfiles, .dockerignore and brand logo

- apps/api/Dockerfile: multi-stage pnpm build, runtime node:22-alpine, port 3001
- apps/web/Dockerfile: multi-stage pnpm + Vite, runtime nginx:alpine with SPA config
- .dockerignore: excludes node_modules, dist, .env, .git, IDE folders, design docs
- Brand logo (naturcalabacera.webp) integrated as favicon, sidebar icon, header logo
- index.html title updated to 'Naturcalabacera · Reservas'

.dockerignore

@@ -0,0 +1,63 @@
+# Dependencias y builds (se generan dentro del contenedor)
+node_modules
+**/node_modules
+dist
+**/dist
+
+# Variables de entorno (NUNCA en imágenes)
+.env
+.env.*
+**/.env
+**/.env.*
+!**/.env.example
+
+# Git
+.git
+.gitignore
+
+# Editor / SO
+.vscode
+.idea
+.DS_Store
+*.swp
+*.swo
+
+# Logs
+*.log
+logs
+
+# Documentación y archivos de planificación que no necesita el build
+*.md
+!README.md
+architecture
+directivas
+skills
+.agents
+.claude
+.codebuddy
+.commandcode
+.continue
+.crush
+.factory
+.goose
+.kilocode
+.kiro
+.mcpjam
+.mux
+.neovate
+.openhands
+.pi
+.qoder
+.qwen
+.roo
+.tmp
+.trae
+.windsurf
+.zencoder
+findings.md
+gemini.md
+progress.md
+task_plan.md
+
+# Imágenes de diseño en raíz
+*.png