feat: extract landing to separate service with Docker + status badge

- landing/ structure with src/, Dockerfile, nginx.conf
- docker-compose.landing.yml on port 8080:80
- status.js with build status badge (CI, commit, issues)
- api/status.json fallback
- Glassmorphism cyberpunk styling matching existing design

docker/docker-compose.landing.yml

@@ -0,0 +1,25 @@
+version: '3.8'
+
+services:
+  landing:
+    build:
+      context: ../landing
+      dockerfile: Dockerfile
+    container_name: phantom-landing
+    ports:
+      - "8080:80"
+    environment:
+      - API_STATUS_URL=${API_STATUS_URL:-http://host.docker.internal:3000/api/status}
+    restart: unless-stopped
+    networks:
+      - landing-network
+    healthcheck:
+      test: ["CMD", "curl", "-f", "http://localhost:80/health.json"]
+      interval: 30s
+      timeout: 5s
+      retries: 3
+      start_period: 10s
+
+networks:
+  landing-network:
+    driver: bridge