Set up a mediasoup Worker, Router, and WebRtcTransport for a video room

Verified steps

1. Install the mediasoup npm package (requires Node.js and build tools for the C++ worker); import mediasoup and call mediasoup.createWorker() with rtcMinPort and rtcMaxPort matching your open firewall range.
2. On the created Worker, call worker.createRouter({ mediaCodecs }) passing an array of codec capability objects (e.g., VP8, opus) to create a Router that all participants in one room will share.
3. For each participant, call router.createWebRtcTransport({ listenIps, enableUdp, enableTcp, preferUdp }) — listenIps should include your server's announced IP — and send the returned id, iceParameters, iceCandidates, and dtlsParameters back to the client via your signaling channel.
4. The client calls device.load({ routerRtpCapabilities }) then creates its own send/recv transports and signals the DTLS role back; call serverTransport.connect({ dtlsParameters }) on the server side to complete the DTLS handshake.
5. For publishing, the client signals produce intent; call transport.produce({ kind, rtpParameters }) on the server and return the new producerId to the client.
6. For subscribing, call router.canConsume({ producerId, rtpCapabilities }) then transport.consume({ producerId, rtpCapabilities, paused: true }), send consumer parameters to the client, and let the client resume after rendering.