Replace Nuxt wiki with Outline deployment config

Strip the Nuxt 4 static site and replace with Docker Compose config
for self-hosted Outline wiki (Outline + PostgreSQL 16 + Redis 7).
Adds nginx reverse proxy with WebSocket support and CSS injection,
migration script for existing markdown articles, backup script,
and starter theme CSS.

docker-compose.yml

@@ -1,64 +1,62 @@
-version: '3.8'
-
 services:
-  # MongoDB Database
-  mongodb:
-    image: mongo:7
-    container_name: wiki-mongodb
+  outline:
+    image: docker.getoutline.com/outlinewiki/outline:latest
+    container_name: outline
     restart: unless-stopped
     ports:
-      - "27017:27017"
-    environment:
-      MONGO_INITDB_ROOT_USERNAME: admin
-      MONGO_INITDB_ROOT_PASSWORD: changeme
-      MONGO_INITDB_DATABASE: wiki-ghostguild
-    volumes:
-      - mongodb_data:/data/db
-      - ./docker/init-mongo.js:/docker-entrypoint-initdb.d/init-mongo.js:ro
-    networks:
-      - wiki-network
-
-  # Wiki Application (for local development)
-  # Uncomment to run the app in Docker
-  # wiki:
-  #   build: .
-  #   container_name: wiki-app
-  #   restart: unless-stopped
-  #   ports:
-  #     - "3000:3000"
-  #   environment:
-  #     MONGODB_URI: mongodb://admin:changeme@mongodb:27017/wiki-ghostguild?authSource=admin
-  #     NODE_ENV: development
-  #   depends_on:
-  #     - mongodb
-  #   networks:
-  #     - wiki-network
-  #   volumes:
-  #     - ./app:/app/app
-  #     - ./server:/app/server
-  #     - ./content:/app/content
-
-  # Optional: Mongo Express for database management
-  mongo-express:
-    image: mongo-express:latest
-    container_name: wiki-mongo-express
-    restart: unless-stopped
-    ports:
-      - "8081:8081"
-    environment:
-      ME_CONFIG_MONGODB_ADMINUSERNAME: admin
-      ME_CONFIG_MONGODB_ADMINPASSWORD: changeme
-      ME_CONFIG_MONGODB_URL: mongodb://admin:changeme@mongodb:27017/
-      ME_CONFIG_BASICAUTH: false
+      - "127.0.0.1:3100:3000"
+    env_file: ./outline.env
     depends_on:
-      - mongodb
-    networks:
-      - wiki-network
+      postgres:
+        condition: service_healthy
+      redis:
+        condition: service_healthy
+    volumes:
+      - outline-storage:/var/lib/outline/data
+
+  postgres:
+    image: postgres:16-alpine
+    container_name: outline-postgres
+    restart: unless-stopped
+    environment:
+      POSTGRES_USER: outline
+      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD}
+      POSTGRES_DB: outline
+    volumes:
+      - postgres-data:/var/lib/postgresql/data
+    command:
+      - "postgres"
+      - "-c"
+      - "shared_buffers=128MB"
+      - "-c"
+      - "max_connections=20"
+      - "-c"
+      - "work_mem=4MB"
+      - "-c"
+      - "maintenance_work_mem=64MB"
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U outline"]
+      interval: 10s
+      timeout: 5s
+      retries: 5
+
+  redis:
+    image: redis:7-alpine
+    container_name: outline-redis
+    restart: unless-stopped
+    command: >
+      redis-server
+      --maxmemory 64mb
+      --maxmemory-policy allkeys-lru
+    volumes:
+      - redis-data:/data
+    healthcheck:
+      test: ["CMD", "redis-cli", "ping"]
+      interval: 10s
+      timeout: 5s
+      retries: 5
 
 volumes:
-  mongodb_data:
-    driver: local
-
-networks:
-  wiki-network:
-    driver: bridge
+  outline-storage:
+  postgres-data:
+  redis-data: