fix: config port timing, fix #4094

[patak-dev]

Description

Fix #4094 by moving the listening handler before the calls to the configureServer hook. In this way this handler is executed before the handlers added by plugins so this pattern works

      configureServer(server) {
        server.httpServer.once('listening', () => {
          console.log(server.config.server.port)
        })
      }

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What is the purpose of this pull request?

• Bug fix
• New Feature
• Documentation update
• Other