Docker build failed

hellow~，I tried to use the code of the master branch to build the docker image, but it failed. I tried the code of 1.0.0 again and got the same error. Can anyone help me?
OS: Ubuntu 20.04
docker: 24.0.7

terminal logs:
```
45.92 Traceback (most recent call last):
45.92 File "utilities/install.py", line 242, in
45.92 geppetto_branch=args.geppetto_version,
45.92 File "utilities/install.py", line 206, in main
45.92 execute(cmd=['yarn', 'install', '--immutable'], cwd=WEBAPP_DIR)
45.92 File "utilities/install.py", line 38, in execute
45.92 exit_code = subprocess.call(cmd, cwd=cwd, *args, **kwargs)
45.92 File "/opt/conda/lib/python3.7/subprocess.py", line 339, in call
45.92 with Popen(*popenargs, **kwargs) as p:
45.92 File "/opt/conda/lib/python3.7/subprocess.py", line 800, in __init__
45.92 restore_signals, start_new_session)
45.92 File "/opt/conda/lib/python3.7/subprocess.py", line 1551, in _execute_child
45.92 raise child_exception_type(errno_num, err_msg, err_filename)
45.92 FileNotFoundError: [Errno 2] No such file or directory: 'yarn': 'yarn'
------
Dockerfile:50
--------------------
48 | RUN jupyter serverextension enable --py --sys-prefix jupyter_geppetto
49 |
50 | >>> RUN python utilities/install.py ${BUILD_ARGS} --workspace $WORKSPACE_VERSION --no-test
51 |
52 | RUN jupyter labextension disable @jupyterlab/hub-extension
--------------------
ERROR: failed to solve: process "/bin/bash -o pipefail -c python utilities/install.py ${BUILD_ARGS} --workspace $WORKSPACE_VERSION --no-test" did not complete successfully: exit code: 1
```

Beginnen Sie mit Zeile 50 der Dockerfile und utilities/install.py, insbesondere mit dem execute-Aufruf in Zeile 38 und dem Aufruf von yarn install in Zeile 206. Reproduzieren Sie den Build mit den gemeldeten Ubuntu- und Docker-Versionen, ermitteln Sie anschließend, warum yarn nicht verfügbar ist, und überprüfen Sie, dass das Docker-Image erfolgreich erstellt wird.

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