Ok dann war ich falsch.
Loxone wurde auch als beispielptojekt für den devcontainer genannt und ich hatte vor kurzem das selbe Problem mit parcel

Dann scheint es bei dir was anderes zu sein

nein
parcel war mal eine zeitlang das build system für die react komponenten.
dann ist man auf esbuild gewechselt und hat diverse dinge aus dem devcontainer nicht ausgebaut.

es reicht, wenn du aus der datei .devcontainer/docker-compose.yml
alle parcel relevanten anteile löschst.
so sieht meine aus.

version: "3"

services:
    iobroker:
        build: ./iobroker
        container_name: iobroker-test
        hostname: iobroker-test
        # This port is only internal, so we can work on this while another instance of ioBroker is running on the host
        expose:
            - 8081
        volumes:
            - ..:/workspace:cached
            - iobrokerdata-test:/opt/iobroker
        environment:
            - LANG=en_US.UTF-8
            - LANGUAGE=en_US:en
            - LC_ALL=en_US.UTF-8
            - TZ=Europe/Berlin
            - SETGID=1000

    # Reverse proxy to load up-to-date admin sources from the repo
    nginx:
        image: nginx:latest
        depends_on:
            - iobroker
        links:
            - iobroker
        container_name: nginx-test
        volumes:
            - ./nginx/nginx.conf:/etc/nginx/nginx.conf
            - ..:/workspace:cached
        ports:
            # Make the ioBroker admin available under http://localhost:8082
            - 8082:80

volumes:
    iobrokerdata-test:

mich würde interessieren ob sonst alles klappt.
ich habe da noch ein problemchen entdeckt, was ich hier festgehalten habe
https://github.com/ioBroker/create-adapter/pull/992

    "watch:parcel": "parcel admin/src/index.tsx -d admin/build --hmr-port 1235",

Das scheint spezifisch für iobroker.zigbee zu sein, in anderen Adaptern habe ich das nicht gesehen. Wenn man die Zeile herauslöscht, kann man den dev-server starten und sich verbinden. Der Adapter wird zwar nicht korrekt geladen, was aber an dem USB-Dongle liegt, nicht an dev-server.

user@debian:/opt/iobroker/node_modules/iobroker.zigbee$ dev-server watch
Using profile default
Using profile name "default"
Using adapter name "zigbee"
Install local iobroker.zigbee
/opt/iobroker/node_modules/iobroker.zigbee> npm pack
Packed to iobroker.zigbee-1.7.5.tgz
/opt/iobroker/node_modules/iobroker.zigbee/.dev-server/default> npm install "/opt/iobroker/node_modules/iobroker.zigbee/iobroker.zigbee-1.7.5.tgz"

up to date, audited 465 packages in 18s

42 packages are looking for funding
  run `npm fund` for details

4 vulnerabilities (3 moderate, 1 high)

To address all issues (including breaking changes), run:
  npm audit fix --force

Run `npm audit` for details.
/opt/iobroker/node_modules/iobroker.zigbee/.dev-server/default> node --inspect=127.0.0.1:9228 node_modules/iobroker.js-controller/controller.js
Waiting for js-controller to start...
Waiting for port 26446 to be available...
Debugger listening on ws://127.0.0.1:9228/aed51aa4-2528-4ce9-a8ac-5adf874633ed
For help, see: https://nodejs.org/en/docs/inspector
2022-11-19 19:23:14.561  - info: host.dev-zigbee-debian iobroker.js-controller version 4.0.23 js-controller starting
2022-11-19 19:23:14.564  - info: host.dev-zigbee-debian Copyright (c) 2014-2022 bluefox, 2014 hobbyquaker
2022-11-19 19:23:14.564  - info: host.dev-zigbee-debian hostname: dev-zigbee-debian, node: v16.18.0
2022-11-19 19:23:14.564  - info: host.dev-zigbee-debian ip addresses: 192.168.178.29 fe80::1597:d25f:16a9:33f
2022-11-19 19:23:14.571  - debug: host.dev-zigbee-debian-Server Data File: /opt/iobroker/node_modules/iobroker.zigbee/.dev-server/default/iobroker-data/objects.jsonl
2022-11-19 19:23:14.672  - debug: host.dev-zigbee-debian-Server  Redis inMem-objects listening on port 9001
2022-11-19 19:23:14.673  - debug: host.dev-zigbee-debian Redis Objects: Use Redis connection: 127.0.0.1:26446
2022-11-19 19:23:14.681  - debug: host.dev-zigbee-debian Objects client ready ... initialize now
2022-11-19 19:23:14.726  - debug: host.dev-zigbee-debian Objects create System PubSub Client
2022-11-19 19:23:14.736  - debug: host.dev-zigbee-debian Objects client initialize lua scripts
2022-11-19 19:23:14.751  - debug: host.dev-zigbee-debian Objects connected to redis: 127.0.0.1:26446
2022-11-19 19:23:14.813  - debug: host.dev-zigbee-debian-Server Data File: /opt/iobroker/node_modules/iobroker.zigbee/.dev-server/default/iobroker-data/states.jsonl
2022-11-19 19:23:14.837  - debug: host.dev-zigbee-debian-Server  Redis inMem-states listening on port 9000
2022-11-19 19:23:14.841  - debug: host.dev-zigbee-debian Redis States: Use Redis connection: 127.0.0.1:24446
2022-11-19 19:23:14.894  - debug: host.dev-zigbee-debian States create System PubSub Client
2022-11-19 19:23:14.950  - debug: host.dev-zigbee-debian States connected to redis: 127.0.0.1:24446
2022-11-19 19:23:14.993  - info: host.dev-zigbee-debian connected to Objects and States
2022-11-19 19:23:15.001  - info: host.dev-zigbee-debian added notifications configuration of host
2022-11-19 19:23:15.019  - debug: host.dev-zigbee-debian Plugin sentry Initialize Plugin (enabled=true)
2022-11-19 19:23:15.021  - info: host.dev-zigbee-debian Plugin sentry Sentry Plugin disabled for this process because sending of statistic data is disabled for the system
2022-11-19 19:23:15.095  - info: host.dev-zigbee-debian Delete state "system.host.dev-zigbee-debian.versions.nodeCurrent"
2022-11-19 19:23:15.098  - info: host.dev-zigbee-debian 4 instances found
2022-11-19 19:23:15.098  - debug: host.dev-zigbee-debian check instance "system.adapter.admin.0" for host "dev-zigbee-debian"
host.dev-zigbee-debian check instance "system.adapter.admin.0" for host "dev-zigbee-debian"
2022-11-19 19:23:15.103  - debug: host.dev-zigbee-debian check instance "system.adapter.zigbee.0" for host "dev-zigbee-debian"
host.dev-zigbee-debian check instance "system.adapter.zigbee.0" for host "dev-zigbee-debian"
2022-11-19 19:23:15.104  - debug: host.dev-zigbee-debian check instance "system.adapter.discovery.0" for host "dev-zigbee-debian"
host.dev-zigbee-debian check instance "system.adapter.discovery.0" for host "dev-zigbee-debian"
2022-11-19 19:23:15.104  - debug: host.dev-zigbee-debian check instance "system.adapter.backitup.0" for host "dev-zigbee-debian"
host.dev-zigbee-debian check instance "system.adapter.backitup.0" for host "dev-zigbee-debian"
2022-11-19 19:23:15.105  - info: host.dev-zigbee-debian starting 3 instances
2022-11-19 19:23:15.124  - debug: host.dev-zigbee-debian added notifications configuration of system.adapter.admin.0
2022-11-19 19:23:15.125  - debug: host.dev-zigbee-debian startInstance admin.0 loglevel=info, compact=false
2022-11-19 19:23:15.139  - info: host.dev-zigbee-debian instance system.adapter.admin.0 started with pid 3102
2022-11-19 19:23:15.166  - info: host.dev-zigbee-debian Delete state "system.host.dev-zigbee-debian.versions.nodeNewest"
2022-11-19 19:23:15.170  - info: host.dev-zigbee-debian Delete state "system.host.dev-zigbee-debian.versions.nodeNewestNext"
2022-11-19 19:23:15.174  - info: host.dev-zigbee-debian Delete state "system.host.dev-zigbee-debian.versions.npmCurrent"
2022-11-19 19:23:15.177  - info: host.dev-zigbee-debian Delete state "system.host.dev-zigbee-debian.versions.npmNewest"
2022-11-19 19:23:15.181  - info: host.dev-zigbee-debian Delete state "system.host.dev-zigbee-debian.versions.npmNewestNext"
2022-11-19 19:23:15.184  - info: host.dev-zigbee-debian Some obsolete host states deleted.
Port 26446 is available...
Waiting for port 24446 to be available...
Port 24446 is available...
Running inside /opt/iobroker/node_modules/iobroker.zigbee/.dev-server/default
Waiting for port 20446 to be available...
2022-11-19 19:23:16.369  - debug: host.dev-zigbee-debian Incoming Host message getRepository
2022-11-19 19:23:16.453  - info: host.dev-zigbee-debian Updating repository "beta" under "http://download.iobroker.net/sources-dist-latest.json"
Port 20446 is available...
Starting React build
Waiting for first successful React build...
/opt/iobroker/node_modules/iobroker.zigbee> npm run watch:parcel

> iobroker.zigbee@1.7.5 watch:parcel
> parcel admin/src/index.tsx -d admin/build --hmr-port 1235
sh: 1: parcel: not found
dev-server watch [profile]

Run ioBroker dev-server and start the adapter in "watch" mode. The adapter will automatically
restart when its source code changes. You may attach a debugger to the running adapter.

Optionen:
      --version     Version anzeigen                                                       [boolean]
  -t, --temp        Temporary directory where the dev-server data will be located
                                                                  [string] [Standard: ".dev-server"]
      --help        Hilfe anzeigen                                                         [boolean]
  -n, --noStart     Do not start the adapter itself, only watch for changes and sync them. [boolean]
  -x, --noInstall   Do not build and install the adapter before starting.                  [boolean]
  -w, --doNotWatch  Do not watch the given files or directories for changes (provide paths relative
                    to the adapter base directory.                                          [string]

Exited with 127
2022-11-19 19:23:16.885  - info: host.dev-zigbee-debian received SIGINT
2022-11-19 19:23:16.886  - debug: host.dev-zigbee-debian stop isStopping=0 isDaemon=false allInstancesStopped=false
2022-11-19 19:23:16.887  - info: host.dev-zigbee-debian stopInstance system.adapter.admin.0 (force=false, process=true)
2022-11-19 19:23:16.887  - info: host.dev-zigbee-debian stopInstance system.adapter.zigbee.0 (force=false, process=false)
2022-11-19 19:23:16.887  - info: host.dev-zigbee-debian stopInstance system.adapter.discovery.0 (force=false, process=false)
2022-11-19 19:23:16.887  - info: host.dev-zigbee-debian stopInstance system.adapter.backitup.0 (force=false, process=false)
2022-11-19 19:23:16.890  - info: host.dev-zigbee-debian stopInstance system.adapter.admin.0 send kill signal
user@debian:/opt/iobroker/node_modules/iobroker.zigbee$ ================================== > LOG REDIRECT system.adapter.admin.0 => false [Process stopped]
2022-11-19 19:23:17.406  - info: host.dev-zigbee-debian instance system.adapter.admin.0 terminated with code 11 (ADAPTER_REQUESTED_TERMINATION)
2022-11-19 19:23:17.407  - info: host.dev-zigbee-debian All instances are stopped.
================================== > LOG REDIRECT system.adapter.admin.0 => false [system.adapter.admin.0.logging]
2022-11-19 19:23:17.490  - debug: host.dev-zigbee-debian Plugin sentry destroyed
2022-11-19 19:23:17.577  - info: host.dev-zigbee-debian terminated
2022-11-19 19:23:18.223  - warn: host.dev-zigbee-debian Repository object could not be updated: DB closed

Ich bin wie gesagt Einsteiger in Linux/Node und IOBroker Internas, und verstehe deshalb nicht, was mir das Programm mit 'sh: l: parcel: not found' sagen möchte.
Ist das ein Node-Modul, was man noch installieren muss?
Oder fehlt etwas in iobroker?
Warum könnte etwas fehlen, wenn ich eigentlich alle Schritte zur Installation von iobroker und dev-server ausgeführt habe?