fix: Update ports to avoid conflicts with existing Docker projects

- Change Gitea port from 3000 to 3001
- Change API port from 8080 to 8082
- Change Nginx port from 80 to 8083
- Add docker-compose.override.yml for local development
- Add deployment guide for existing servers

server/ecosystem.config.js

@@ -0,0 +1,29 @@
+module.exports = {
+  apps: [{
+    name: 'nanaxe-api',
+    script: './api/src/index.js',
+    instances: 1,
+    exec_mode: 'fork',
+    env: {
+      NODE_ENV: 'production',
+      PORT: 3001
+    },
+    error_file: './logs/err.log',
+    out_file: './logs/out.log',
+    log_file: './logs/combined.log',
+    time: true,
+    max_memory_restart: '256M',
+    restart_delay: 3000,
+    max_restarts: 5,
+    min_uptime: '10s',
+    watch: false,
+    ignore_watch: ['node_modules', 'logs', 'data'],
+    merge_logs: true,
+    log_type: 'json',
+    log_date_format: 'YYYY-MM-DD HH:mm:ss Z',
+    // Auto-restart on failure
+    autorestart: true,
+    // Don't restart if crashing too fast
+    exp_backoff_restart_delay: 100
+  }]
+};