feat: quickstart stack - Ollama + Open WebUI

- docker-compose.yml: minimal local AI stack
- deploy.sh: automated deployment with Docker/RAM checks
- README.md: landing page with model selection table

docker-compose.yml

@@ -0,0 +1,56 @@
+# d0a1 quickstart — IA agéntica local, sin coste, sin VPS
+# Ejecuta: ./deploy.sh
+# Abre: http://localhost:3000
+#
+# Requisitos: Docker + 8 GB RAM mínimo
+# Incluye: Ollama (LLM local) + Open WebUI (interfaz web)
+# Modelo por defecto: llama3.2:3b (~2 GB, corre en 8 GB RAM)
+services:
+  ollama:
+    container_name: d0a1-ollama
+    image: ollama/ollama:0.30.8
+    restart: unless-stopped
+    ports:
+      - "127.0.0.1:11434:11434"
+    volumes:
+      - ollama_data:/root/.ollama
+    environment:
+      OLLAMA_HOST: "0.0.0.0"
+      OLLAMA_KEEP_ALIVE: "5m"
+      OLLAMA_NUM_PARALLEL: "1"
+    healthcheck:
+      test: ["CMD", "ollama", "ps"]
+      interval: 15s
+      timeout: 5s
+      retries: 10
+      start_period: 30s
+
+  openwebui:
+    container_name: d0a1-openwebui
+    image: ghcr.io/open-webui/open-webui:0.6.15
+    restart: unless-stopped
+    ports:
+      - "3000:8080"
+    volumes:
+      - openwebui_data:/app/backend/data
+    environment:
+      OLLAMA_BASE_URL: "http://ollama:11434"
+      WEBUI_NAME: "d0a1 quickstart"
+      WEBUI_AUTH: "false"
+      DEFAULT_LOCALE: "es"
+      ENABLE_SIGNUP: "true"
+      ENABLE_WEB_SEARCH: "false"
+      ENABLE_DIRECT_CONNECTIONS: "false"
+    depends_on:
+      ollama:
+        condition: service_healthy
+    deploy:
+      resources:
+        limits:
+          memory: 2G
+
+volumes:
+  ollama_data:
+    driver: local
+  openwebui_data:
+    driver: local