WebRT problem with port bind? // Documentation missing ports / range?

First try to deploy meething-docker.

config

module.exports = {
  apps : [{
    name: 'meething',
    script: '/meething/src/app.js',
    watch: './meething/src',
    env : {
      SSL : false,
      SSLKEY : '/certs/privkey.pem',
      SSLCERT  : '/certs/fullchain.pem',
      DEBUG : false
    }
  },{
    name: 'mediasoup',
    script: '/mediasoup/main.js',
    env : {
      SSL : false,
      SSLKEY : '/certs/privkey.pem',
      SSLCERT  : '/certs/fullchain.pem',
      DEBUG : false
    }
  },{
    name: 'gunsocket',
    script: '/gun/server.js',
    env : {
      SSL : false,
      SSLKEY : '/certs/privkey.pem',
      SSLCERT  : '/certs/fullchain.pem',
      PORT : 8765,
      DEBUG : false
    }
  }]
};

Error message on login / connect

protoo connection request [peerId:<CLIENT_IP>, address:/?roomId=Wupudaipo-Catherine-Fuudsev&peerId=99128d3c-5b72-4608-a023-f3041a8a29d6, room:%s]
new room stat Wupudaipo-Catherine-Fuudsev 99128d3c-5b72-4608-a023-f3041a8a29d6 { peer: 1, transport: 0, transports: [] }
request:getRouterRtpCapabilities
request:createWebRtcTransport
request failed:Error: port bind failed due to address not available [transport:udp, ip:'<SERVER_IP>', port:20785, attempt:1/10000]
    at Channel._processMessage (/mediasoup/node_modules/mediasoup/lib/Channel.js:206:37)
    at Socket.<anonymous> (/mediasoup/node_modules/mediasoup/lib/Channel.js:68:34)
    at Socket.emit (events.js:315:20)
    at addChunk (_stream_readable.js:295:12)
    at readableAddChunk (_stream_readable.js:271:9)
    at Socket.Readable.push (_stream_readable.js:212:10)
    at Pipe.onStreamRead (internal/stream_base_commons.js:186:23) {
  [stack]: "Error: port bind failed due to address not available [transport:udp, ip:'<SERVER_IP>', port:20785, attempt:1/10000]\n" +
    '    at Channel._processMessage (/mediasoup/node_modules/mediasoup/lib/Channel.js:206:37)\n' +
    '    at Socket.<anonymous> (/mediasoup/node_modules/mediasoup/lib/Channel.js:68:34)\n' +
    '    at Socket.emit (events.js:315:20)\n' +
    '    at addChunk (_stream_readable.js:295:12)\n' +
    '    at readableAddChunk (_stream_readable.js:271:9)\n' +
    '    at Socket.Readable.push (_stream_readable.js:212:10)\n' +
    '    at Pipe.onStreamRead (internal/stream_base_commons.js:186:23)',
  [message]: "port bind failed due to address not available [transport:udp, ip:'<SERVER_IP>', port:20785, attempt:1/10000]"
}
request:createWebRtcTransport
request failed:Error: port bind failed due to address not available [transport:udp, ip:'<SERVER_IP>', port:27500, attempt:1/10000]
    at Channel._processMessage (/mediasoup/node_modules/mediasoup/lib/Channel.js:206:37)
    at Socket.<anonymous> (/mediasoup/node_modules/mediasoup/lib/Channel.js:68:34)
    at Socket.emit (events.js:315:20)
    at addChunk (_stream_readable.js:295:12)
    at readableAddChunk (_stream_readable.js:271:9)
    at Socket.Readable.push (_stream_readable.js:212:10)
    at Pipe.onStreamRead (internal/stream_base_commons.js:186:23) {
  [stack]: "Error: port bind failed due to address not available [transport:udp, ip:'<SERVER_IP>', port:27500, attempt:1/10000]\n" +
    '    at Channel._processMessage (/mediasoup/node_modules/mediasoup/lib/Channel.js:206:37)\n' +
    '    at Socket.<anonymous> (/mediasoup/node_modules/mediasoup/lib/Channel.js:68:34)\n' +
    '    at Socket.emit (events.js:315:20)\n' +
    '    at addChunk (_stream_readable.js:295:12)\n' +
    '    at readableAddChunk (_stream_readable.js:271:9)\n' +
    '    at Socket.Readable.push (_stream_readable.js:212:10)\n' +
    '    at Pipe.onStreamRead (internal/stream_base_commons.js:186:23)',
  [message]: "port bind failed due to address not available [transport:udp, ip:'<SERVER_IP>', port:27500, attempt:1/10000]"
}
request:join

Do I need more ports mapped to the docker container like 27500/udp? Haven't found such an information in readme file?

The README is the named documentation entry point; start by checking its Docker port-mapping instructions against the shown configuration and the mediasoup bind errors on ports 20785 and 27500. Done means documenting the required container port or port range, including UDP mapping, if that is the supported deployment setup.