feat: add 18 AI/ML Portainer templates with gap analysis

ai-templates/stacks/open-webui/docker-compose.yml

@@ -0,0 +1,39 @@
+version: "3.8"
+
+services:
+  open-webui:
+    image: ghcr.io/open-webui/open-webui:main
+    container_name: open-webui
+    restart: unless-stopped
+    ports:
+      - "${OPEN_WEBUI_PORT:-3000}:8080"
+    volumes:
+      - open_webui_data:/app/backend/data
+    environment:
+      - OLLAMA_BASE_URL=${OLLAMA_BASE_URL:-http://ollama:11434}
+      - WEBUI_SECRET_KEY=${WEBUI_SECRET_KEY:-changeme}
+      - ENABLE_SIGNUP=${ENABLE_SIGNUP:-true}
+    depends_on:
+      - ollama
+
+  ollama:
+    image: ollama/ollama:latest
+    container_name: ollama
+    restart: unless-stopped
+    ports:
+      - "${OLLAMA_PORT:-11434}:11434"
+    volumes:
+      - ollama_data:/root/.ollama
+    environment:
+      - OLLAMA_HOST=0.0.0.0
+    deploy:
+      resources:
+        reservations:
+          devices:
+            - driver: nvidia
+              count: all
+              capabilities: [gpu]
+
+volumes:
+  open_webui_data:
+  ollama_data: