Add pm2 process management

- Add ecosystem.config.js with mcp-hub and sample-mcp app configs
- Add pm2:start, pm2:stop, pm2:logs, pm2:status scripts to package.json

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

ecosystem.config.js

@@ -0,0 +1,24 @@
+module.exports = {
+  apps: [
+    {
+      name: 'mcp-hub',
+      script: 'src/index.js',
+      cwd: '/workspace',
+      env: { NODE_ENV: 'production', PORT: 3000 },
+      max_restarts: 10,
+      restart_delay: 1000,
+      log_date_format: 'YYYY-MM-DD HH:mm:ss Z',
+      merge_logs: true
+    },
+    {
+      name: 'sample-mcp',
+      script: 'sample-mcp/index.js',
+      cwd: '/workspace',
+      env: { NODE_ENV: 'production' },
+      max_restarts: 10,
+      restart_delay: 2000,
+      log_date_format: 'YYYY-MM-DD HH:mm:ss Z',
+      merge_logs: true
+    }
+  ]
+};