Add Docker deployment as the recommended production setup.

Include Dockerfile, docker-compose on port 3130, npm mirror config, deploy scripts, and DOCKER.md; keep PM2 docs as fallback.

Co-authored-by: Cursor <cursoragent@cursor.com>

.dockerignore

@@ -0,0 +1,18 @@
+node_modules
+.next
+.git
+.gitignore
+.env
+.env.local
+.env*.local
+logs
+*.log
+npm-debug.log*
+.DS_Store
+coverage
+.cursor
+README.md
+docs
+content/zhouyi/scripts
+ecosystem.config.cjs
+scripts/deploy.sh