Logs of overrides settings for JupyterLab

gistfile1.txt

$ cat Dockerfile 
FROM jupyter/scipy-notebook:lab-3.3.2
COPY overrides.json /opt/conda/share/jupyter/lab/settings/overrides.json

$ cat overrides.json 
{
  "@jupyterlab/apputils-extension:themes": {
    "theme": "JupyterLab Dark"
  }
}

$ docker build -t overrides-test .

$ docker run -it --rm -p 8888:8888 overrides-test
Entered start.sh with args: jupyter lab
Executing the command: jupyter lab
[I 2022-04-02 23:40:09.182 ServerApp] jupyterlab | extension was successfully linked.
[W 2022-04-02 23:40:09.186 NotebookApp] 'ip' has moved from NotebookApp to ServerApp. This config will be passed to ServerApp. Be sure to update your config before our next release.
[W 2022-04-02 23:40:09.186 NotebookApp] 'port' has moved from NotebookApp to ServerApp. This config will be passed to ServerApp. Be sure to update your config before our next release.
[W 2022-04-02 23:40:09.186 NotebookApp] 'port' has moved from NotebookApp to ServerApp. This config will be passed to ServerApp. Be sure to update your config before our next release.
[I 2022-04-02 23:40:09.193 ServerApp] nbclassic | extension was successfully linked.
[I 2022-04-02 23:40:09.195 ServerApp] Writing Jupyter server cookie secret to /home/jovyan/.local/share/jupyter/runtime/jupyter_cookie_secret
[I 2022-04-02 23:40:09.419 ServerApp] notebook_shim | extension was successfully linked.
[I 2022-04-02 23:40:09.443 ServerApp] notebook_shim | extension was successfully loaded.
[I 2022-04-02 23:40:09.445 LabApp] JupyterLab extension loaded from /opt/conda/lib/python3.9/site-packages/jupyterlab
[I 2022-04-02 23:40:09.445 LabApp] JupyterLab application directory is /opt/conda/share/jupyter/lab
[I 2022-04-02 23:40:09.449 ServerApp] jupyterlab | extension was successfully loaded.
[I 2022-04-02 23:40:09.454 ServerApp] nbclassic | extension was successfully loaded.
[I 2022-04-02 23:40:09.454 ServerApp] Serving notebooks from local directory: /home/jovyan
[I 2022-04-02 23:40:09.455 ServerApp] Jupyter Server 1.16.0 is running at:
[I 2022-04-02 23:40:09.455 ServerApp] http://932e71158dae:8888/lab?token=b21128ac8a81fe37e5a8125bc520d7d5fd07df12ca6949a2
[I 2022-04-02 23:40:09.455 ServerApp]  or http://127.0.0.1:8888/lab?token=b21128ac8a81fe37e5a8125bc520d7d5fd07df12ca6949a2
[I 2022-04-02 23:40:09.455 ServerApp] Use Control-C to stop this server and shut down all kernels (twice to skip confirmation).
[C 2022-04-02 23:40:09.458 ServerApp] 
    
    To access the server, open this file in a browser:
        file:///home/jovyan/.local/share/jupyter/runtime/jpserver-7-open.html
    Or copy and paste one of these URLs:
        http://932e71158dae:8888/lab?token=b21128ac8a81fe37e5a8125bc520d7d5fd07df12ca6949a2
     or http://127.0.0.1:8888/lab?token=b21128ac8a81fe37e5a8125bc520d7d5fd07df12ca6949a2
/opt/conda/share/jupyter/lab/settings/overrides.json {'@jupyterlab/apputils-extension:themes': {'theme': 'JupyterLab Dark'}}
/opt/conda/share/jupyter/lab/settings/overrides.json {'@jupyterlab/apputils-extension:themes': {'theme': 'JupyterLab Dark'}}
/opt/conda/share/jupyter/lab/settings/overrides.json {'@jupyterlab/apputils-extension:themes': {'theme': 'JupyterLab Dark'}}
/opt/conda/share/jupyter/lab/settings/overrides.json {'@jupyterlab/apputils-extension:themes': {'theme': 'JupyterLab Dark'}}
/opt/conda/share/jupyter/lab/settings/overrides.json {'@jupyterlab/apputils-extension:themes': {'theme': 'JupyterLab Dark'}}
/opt/conda/share/jupyter/lab/settings/overrides.json {'@jupyterlab/apputils-extension:themes': {'theme': 'JupyterLab Dark'}}
/opt/conda/share/jupyter/lab/settings/overrides.json {'@jupyterlab/apputils-extension:themes': {'theme': 'JupyterLab Dark'}}
/opt/conda/share/jupyter/lab/settings/overrides.json {'@jupyterlab/apputils-extension:themes': {'theme': 'JupyterLab Dark'}}
/opt/conda/share/jupyter/lab/settings/overrides.json {'@jupyterlab/apputils-extension:themes': {'theme': 'JupyterLab Dark'}}
/opt/conda/share/jupyter/lab/settings/overrides.json {'@jupyterlab/apputils-extension:themes': {'theme': 'JupyterLab Dark'}}
/opt/conda/share/jupyter/lab/settings/overrides.json {'@jupyterlab/apputils-extension:themes': {'theme': 'JupyterLab Dark'}}
/opt/conda/share/jupyter/lab/settings/overrides.json {'@jupyterlab/apputils-extension:themes': {'theme': 'JupyterLab Dark'}}
/opt/conda/share/jupyter/lab/settings/overrides.json {'@jupyterlab/apputils-extension:themes': {'theme': 'JupyterLab Dark'}}
/opt/conda/share/jupyter/lab/settings/overrides.json {'@jupyterlab/apputils-extension:themes': {'theme': 'JupyterLab Dark'}}
/opt/conda/share/jupyter/lab/settings/overrides.json {'@jupyterlab/apputils-extension:themes': {'theme': 'JupyterLab Dark'}}
[I 2022-04-02 23:40:26.410 LabApp] Build is up to date
/opt/conda/share/jupyter/lab/settings/overrides.json {'@jupyterlab/apputils-extension:themes': {'theme': 'JupyterLab Dark'}}