Complete Node.js container implementation with multi-version support

- Add Dockerfile with AlmaLinux 9 base, Nginx reverse proxy, and PM2
- Support Node.js versions 18, 20, 22 with automated installation
- Implement memory-optimized configuration (256MB minimum, 512MB recommended)
- Add Memcached session storage for development environments
- Create comprehensive documentation (README, USER-GUIDE, MEMORY-GUIDE, CLAUDE.md)
- Include example applications (simple website and REST API)
- Add Gitea CI/CD pipeline for automated multi-version builds
- Provide local development script with helper utilities
- Implement health monitoring, log rotation, and backup systems

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

configs/nginx.conf

@@ -0,0 +1,45 @@
+user nginx;
+worker_processes 1; # Single worker for memory efficiency
+worker_rlimit_nofile 1024;
+error_log /var/log/nginx/error.log warn; # Less verbose logging
+pid /run/nginx.pid;
+
+events {
+    worker_connections 512; # Reduced for memory efficiency
+    use epoll;
+    multi_accept on;
+}
+
+http {
+    # Memory-optimized settings
+    client_body_buffer_size 16k;
+    client_header_buffer_size 1k;
+    client_max_body_size 8m;
+    large_client_header_buffers 2 1k;
+    
+    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
+                      '$status $body_bytes_sent "$http_referer" '
+                      '"$http_user_agent" "$http_x_forwarded_for"';
+
+    access_log  /var/log/nginx/access.log  main buffer=16k flush=2m;
+
+    sendfile            on;
+    tcp_nopush          on;
+    tcp_nodelay         on;
+    keepalive_timeout   30; # Reduced from 65
+    keepalive_requests  100;
+    types_hash_max_size 1024; # Reduced from 2048
+    server_tokens       off;
+
+    include             /etc/nginx/mime.types;
+    default_type        application/octet-stream;
+
+    # Optimized gzip compression
+    gzip on;
+    gzip_vary on;
+    gzip_min_length 1024;
+    gzip_comp_level 2; # Lower compression for less CPU/memory usage
+    gzip_types text/plain text/css application/json application/javascript text/xml application/xml application/xml+rss text/javascript;
+
+    include /etc/nginx/conf.d/*.conf;
+}